231550641 has 24 divisors (see below), whose sum is σ = 384396480. Its totient is φ = 131569056.

The previous prime is 231550607. The next prime is 231550643. The reversal of 231550641 is 146055132.

231550641 is a `hidden beast` number, since 2 + 3 + 15 + 5 + 0 + 641 = 666.

It is not a de Polignac number, because 231550641 - 2⁶ = 231550577 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231550643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1011 + ... + 21543.

It is an arithmetic number, because the mean of its divisors is an integer number (16016520).

Almost surely, 2^231550641 is an apocalyptic number.

231550641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231550641 is a deficient number, since it is larger than the sum of its proper divisors (152845839).

231550641 is a wasteful number, since it uses less digits than its factorization.

231550641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20725 (or 20722 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 231550641 is about 15216.7881302199. The cubic root of 231550641 is about 614.0663922874.

The spelling of 231550641 in words is "two hundred thirty-one million, five hundred fifty thousand, six hundred forty-one".