232812561 has 4 divisors (see below), whose sum is σ = 310416752. Its totient is φ = 155208372.

The previous prime is 232812553. The next prime is 232812563. The reversal of 232812561 is 165218232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 232812561 - 2³ = 232812553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232812563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38802091 + ... + 38802096.

It is an arithmetic number, because the mean of its divisors is an integer number (77604188).

Almost surely, 2^232812561 is an apocalyptic number.

It is an amenable number.

232812561 is a deficient number, since it is larger than the sum of its proper divisors (77604191).

232812561 is an equidigital number, since it uses as much as digits as its factorization.

232812561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77604190.

The product of its digits is 5760, while the sum is 30.

The square root of 232812561 is about 15258.1965185929. The cubic root of 232812561 is about 615.1798984587.

The spelling of 232812561 in words is "two hundred thirty-two million, eight hundred twelve thousand, five hundred sixty-one".