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21241320143 = 61675197289
BaseRepresentation
bin10011110010000101…
…001101001011001111
32000211100021212100212
4103302011031023033
5322000234221033
613431431113035
71351244146031
oct236205151317
960740255325
1021241320143
11901019823a
12414981277b
1320069087b4
1410570cdc51
15844c19748
hex4f214d2cf

21241320143 has 8 divisors (see below), whose sum is σ = 21911774640. Its totient is φ = 20581260480.

The previous prime is 21241320137. The next prime is 21241320179. The reversal of 21241320143 is 34102314212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21241320143 - 234 = 4061450959 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 (21241320043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2594558 + ... + 2602731.

It is an arithmetic number, because the mean of its divisors is an integer number (2738971830).

Almost surely, 221241320143 is an apocalyptic number.

21241320143 is a deficient number, since it is larger than the sum of its proper divisors (670454497).

21241320143 is an equidigital number, since it uses as much as digits as its factorization.

21241320143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197417.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21241320143 its reverse (34102314212), we get a palindrome (55343634355).

The spelling of 21241320143 in words is "twenty-one billion, two hundred forty-one million, three hundred twenty thousand, one hundred forty-three".

Divisors: 1 61 67 4087 5197289 317034629 348218363 21241320143