155113315431 has 16 divisors (see below), whose sum is σ = 209463244800. Its totient is φ = 102086476128.

The previous prime is 155113315421. The next prime is 155113315451. The reversal of 155113315431 is 134513311551.

It is not a de Polignac number, because 155113315431 - 2⁹ = 155113314919 is a prime.

It is a super-2 number, since 2×155113315431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155113315392 and 155113315401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155113315421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1958850 + ... + 2036496.

It is an arithmetic number, because the mean of its divisors is an integer number (13091452800).

Almost surely, 2^155113315431 is an apocalyptic number.

155113315431 is a deficient number, since it is larger than the sum of its proper divisors (54349929369).

155113315431 is an equidigital number, since it uses as much as digits as its factorization.

155113315431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86158.

The product of its digits is 13500, while the sum is 33.

Adding to 155113315431 its reverse (134513311551), we get a palindrome (289626626982).

The spelling of 155113315431 in words is "one hundred fifty-five billion, one hundred thirteen million, three hundred fifteen thousand, four hundred thirty-one".