155245233531 has 32 divisors (see below), whose sum is σ = 212379148800. Its totient is φ = 100849492224.

The previous prime is 155245233509. The next prime is 155245233547. The reversal of 155245233531 is 135332542551.

It is not a de Polignac number, because 155245233531 - 2⁵ = 155245233499 is a prime.

It is a super-2 number, since 2×155245233531² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155245233531.

It is not an unprimeable number, because it can be changed into a prime (155245233131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4910631 + ... + 4942143.

It is an arithmetic number, because the mean of its divisors is an integer number (6636848400).

Almost surely, 2^155245233531 is an apocalyptic number.

155245233531 is a deficient number, since it is larger than the sum of its proper divisors (57133915269).

155245233531 is a wasteful number, since it uses less digits than its factorization.

155245233531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31875.

The product of its digits is 270000, while the sum is 39.

The spelling of 155245233531 in words is "one hundred fifty-five billion, two hundred forty-five million, two hundred thirty-three thousand, five hundred thirty-one".