155022111231 has 24 divisors (see below), whose sum is σ = 223857332496. Its totient is φ = 95381844480.

The previous prime is 155022111227. The next prime is 155022111263. The reversal of 155022111231 is 132111220551.

It is not a de Polignac number, because 155022111231 - 2² = 155022111227 is a prime.

It is a super-2 number, since 2×155022111231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155022101231) 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, 3360301 + ... + 3406121.

It is an arithmetic number, because the mean of its divisors is an integer number (9327388854).

Almost surely, 2^155022111231 is an apocalyptic number.

155022111231 is a deficient number, since it is larger than the sum of its proper divisors (68835221265).

155022111231 is a wasteful number, since it uses less digits than its factorization.

155022111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52523 (or 52510 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 155022111231 its reverse (132111220551), we get a palindrome (287133331782).

The spelling of 155022111231 in words is "one hundred fifty-five billion, twenty-two million, one hundred eleven thousand, two hundred thirty-one".