231532575551 has 8 divisors (see below), whose sum is σ = 245127281520. Its totient is φ = 218078747712.

The previous prime is 231532575497. The next prime is 231532575581. The reversal of 231532575551 is 155575235132.

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

It is a cyclic number.

It is not a de Polignac number, because 231532575551 - 2¹⁰ = 231532574527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231532575581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35216150 + ... + 35222723.

It is an arithmetic number, because the mean of its divisors is an integer number (30640910190).

Almost surely, 2^231532575551 is an apocalyptic number.

231532575551 is a deficient number, since it is larger than the sum of its proper divisors (13594705969).

231532575551 is a wasteful number, since it uses less digits than its factorization.

231532575551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70439065.

The product of its digits is 787500, while the sum is 44.

The spelling of 231532575551 in words is "two hundred thirty-one billion, five hundred thirty-two million, five hundred seventy-five thousand, five hundred fifty-one".