15420512055231 has 24 divisors (see below), whose sum is σ = 22411422437040. Its totient is φ = 10216953242496.

The previous prime is 15420512055229. The next prime is 15420512055233. The reversal of 15420512055231 is 13255021502451.

15420512055231 is a `hidden beast` number, since 1 + 5 + 4 + 2 + 0 + 5 + 120 + 5 + 523 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (15420512055229) and next prime (15420512055233).

It is not a de Polignac number, because 15420512055231 - 2¹ = 15420512055229 is a prime.

It is a super-2 number, since 2×15420512055231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420512055233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52720435 + ... + 53012123.

It is an arithmetic number, because the mean of its divisors is an integer number (933809268210).

Almost surely, 2^{15420512055231} is an apocalyptic number.

15420512055231 is a deficient number, since it is larger than the sum of its proper divisors (6990910381809).

15420512055231 is a wasteful number, since it uses less digits than its factorization.

15420512055231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327895 (or 327892 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

Adding to 15420512055231 its reverse (13255021502451), we get a palindrome (28675533557682).

The spelling of 15420512055231 in words is "fifteen trillion, four hundred twenty billion, five hundred twelve million, fifty-five thousand, two hundred thirty-one".