231551351335545 has 64 divisors (see below), whose sum is σ = 379018811070720. Its totient is φ = 120684603138048.

The previous prime is 231551351335531. The next prime is 231551351335583. The reversal of 231551351335545 is 545533153155132.

It is not a de Polignac number, because 231551351335545 - 2¹⁶ = 231551351270009 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52160977 + ... + 56425793.

It is an arithmetic number, because the mean of its divisors is an integer number (5922168922980).

Almost surely, 2^{231551351335545} is an apocalyptic number.

It is an amenable number.

231551351335545 is a deficient number, since it is larger than the sum of its proper divisors (147467459735175).

231551351335545 is a wasteful number, since it uses less digits than its factorization.

231551351335545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265354.

The product of its digits is 10125000, while the sum is 51.

The spelling of 231551351335545 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, three hundred fifty-one million, three hundred thirty-five thousand, five hundred forty-five".