231545551551515 has 8 divisors (see below), whose sum is σ = 278748085213728. Its totient is φ = 184640825673280.

The previous prime is 231545551551493. The next prime is 231545551551551. The reversal of 231545551551515 is 515155155545132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231545551551515 - 2¹⁴ = 231545551535131 is a prime.

It is a super-2 number, since 2×231545551551515² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74451944282 + ... + 74451947391.

It is an arithmetic number, because the mean of its divisors is an integer number (34843510651716).

Almost surely, 2^{231545551551515} is an apocalyptic number.

231545551551515 is a deficient number, since it is larger than the sum of its proper divisors (47202533662213).

231545551551515 is a wasteful number, since it uses less digits than its factorization.

231545551551515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148903891989.

The product of its digits is 9375000, while the sum is 53.

The spelling of 231545551551515 in words is "two hundred thirty-one trillion, five hundred forty-five billion, five hundred fifty-one million, five hundred fifty-one thousand, five hundred fifteen".