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31225425145 = 553151780343
BaseRepresentation
bin11101000101001011…
…100010110011111001
32222121011010221122121
4131011023202303321
51002422202101040
622202245121241
72153536506625
oct350513426371
988534127577
1031225425145
1112273a36092
1260753b9221
132c3821c135
1417230b6185
15c2b4d7c4a
hex7452e2cf9

31225425145 has 16 divisors (see below), whose sum is σ = 38430381312. Its totient is φ = 24346670400.

The previous prime is 31225425131. The next prime is 31225425169. The reversal of 31225425145 is 54152452213.

It is a happy number.

It is not a de Polignac number, because 31225425145 - 27 = 31225425017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31225425145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350157 + ... + 430186.

It is an arithmetic number, because the mean of its divisors is an integer number (2401898832).

Almost surely, 231225425145 is an apocalyptic number.

It is an amenable number.

31225425145 is a deficient number, since it is larger than the sum of its proper divisors (7204956167).

31225425145 is a wasteful number, since it uses less digits than its factorization.

31225425145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780552.

The product of its digits is 48000, while the sum is 34.

Adding to 31225425145 its reverse (54152452213), we get a palindrome (85377877358).

The spelling of 31225425145 in words is "thirty-one billion, two hundred twenty-five million, four hundred twenty-five thousand, one hundred forty-five".

Divisors: 1 5 53 151 265 755 8003 40015 780343 3901715 41358179 117831793 206790895 589158965 6245085029 31225425145