155818026231 has 24 divisors (see below), whose sum is σ = 254396782080. Its totient is φ = 84352614192.

The previous prime is 155818026209. The next prime is 155818026283. The reversal of 155818026231 is 132620818551.

It is not a de Polignac number, because 155818026231 - 2¹⁷ = 155817895159 is a prime.

It is a super-2 number, since 2×155818026231² (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 (155818026431) 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, 27891591 + ... + 27897176.

It is an arithmetic number, because the mean of its divisors is an integer number (10599865920).

Almost surely, 2^155818026231 is an apocalyptic number.

155818026231 is a deficient number, since it is larger than the sum of its proper divisors (98578755849).

155818026231 is a wasteful number, since it uses less digits than its factorization.

155818026231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55788803 (or 55788796 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 155818026231 in words is "one hundred fifty-five billion, eight hundred eighteen million, twenty-six thousand, two hundred thirty-one".