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31421221103503 = 7111494915577821
BaseRepresentation
bin1110010010011110100101…
…01110001110011110001111
311010020211122220221022022101
413021033102232032132033
513104301130100303003
6150454413143455531
76422052102424540
oct711172256163617
9133224586838271
1031421221103503
11a014735188510
1236357874575a7
13146c0156c39aa
147a8b1c1024c7
15397510ead11d
hex1c93d2b8e78f

31421221103503 has 32 divisors (see below), whose sum is σ = 39517753305600. Its totient is φ = 24270210384000.

The previous prime is 31421221103407. The next prime is 31421221103561. The reversal of 31421221103503 is 30530112212413.

It is not a de Polignac number, because 31421221103503 - 241 = 29222197847951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421221103803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2844333 + ... + 8422153.

It is an arithmetic number, because the mean of its divisors is an integer number (1234929790800).

Almost surely, 231421221103503 is an apocalyptic number.

31421221103503 is a deficient number, since it is larger than the sum of its proper divisors (8096532202097).

31421221103503 is a wasteful number, since it uses less digits than its factorization.

31421221103503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578479.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 31421221103503 its reverse (30530112212413), we get a palindrome (61951333315916).

The spelling of 31421221103503 in words is "thirty-one trillion, four hundred twenty-one billion, two hundred twenty-one million, one hundred three thousand, five hundred three".

Divisors: 1 7 11 77 149 491 1043 1639 3437 5401 11473 37807 73159 512113 804749 5577821 5633243 39044747 61356031 429492217 831095329 2738710111 5817667303 9142048619 19170970777 30125811221 63994340333 210880678547 408067806539 2856474645773 4488745871929 31421221103503