231550433145505 has 32 divisors (see below), whose sum is σ = 298025199417600. Its totient is φ = 172167075355392.

The previous prime is 231550433145443. The next prime is 231550433145533. The reversal of 231550433145505 is 505541334055132.

It is a happy number.

It is not a de Polignac number, because 231550433145505 - 2³¹ = 231548285661857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67234051 + ... + 70594039.

It is an arithmetic number, because the mean of its divisors is an integer number (9313287481800).

Almost surely, 2^{231550433145505} is an apocalyptic number.

It is an amenable number.

231550433145505 is a deficient number, since it is larger than the sum of its proper divisors (66474766272095).

231550433145505 is a wasteful number, since it uses less digits than its factorization.

231550433145505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373753.

The product of its (nonzero) digits is 2700000, while the sum is 46.

The spelling of 231550433145505 in words is "two hundred thirty-one trillion, five hundred fifty billion, four hundred thirty-three million, one hundred forty-five thousand, five hundred five".