231515555441145 has 64 divisors (see below), whose sum is σ = 386970319814400. Its totient is φ = 118077478272000.

The previous prime is 231515555441099. The next prime is 231515555441201. The reversal of 231515555441145 is 541144555515132.

It is not a de Polignac number, because 231515555441145 - 2¹¹ = 231515555439097 is a prime.

It is a super-2 number, since 2×231515555441145² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41417206 + ... + 46673504.

It is an arithmetic number, because the mean of its divisors is an integer number (6046411247100).

Almost surely, 2^{231515555441145} is an apocalyptic number.

It is an amenable number.

231515555441145 is a deficient number, since it is larger than the sum of its proper divisors (155454764373255).

231515555441145 is a wasteful number, since it uses less digits than its factorization.

231515555441145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5257706.

The product of its digits is 6000000, while the sum is 51.

The spelling of 231515555441145 in words is "two hundred thirty-one trillion, five hundred fifteen billion, five hundred fifty-five million, four hundred forty-one thousand, one hundred forty-five".