155225752131 has 4 divisors (see below), whose sum is σ = 206967669512. Its totient is φ = 103483834752.

The previous prime is 155225752061. The next prime is 155225752139. The reversal of 155225752131 is 131257522551.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 155225752131 - 2³³ = 146635817539 is a prime.

It is a super-2 number, since 2×155225752131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155225752131.

It is not an unprimeable number, because it can be changed into a prime (155225752139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25870958686 + ... + 25870958691.

It is an arithmetic number, because the mean of its divisors is an integer number (51741917378).

Almost surely, 2^155225752131 is an apocalyptic number.

155225752131 is a deficient number, since it is larger than the sum of its proper divisors (51741917381).

155225752131 is an equidigital number, since it uses as much as digits as its factorization.

155225752131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51741917380.

The product of its digits is 105000, while the sum is 39.

The spelling of 155225752131 in words is "one hundred fifty-five billion, two hundred twenty-five million, seven hundred fifty-two thousand, one hundred thirty-one".