232578561 has 4 divisors (see below), whose sum is σ = 310104752. Its totient is φ = 155052372.

The previous prime is 232578539. The next prime is 232578571. The reversal of 232578561 is 165875232.

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 232578561 - 2⁶ = 232578497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232578571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38763091 + ... + 38763096.

It is an arithmetic number, because the mean of its divisors is an integer number (77526188).

Almost surely, 2^232578561 is an apocalyptic number.

It is an amenable number.

232578561 is a deficient number, since it is larger than the sum of its proper divisors (77526191).

232578561 is an equidigital number, since it uses as much as digits as its factorization.

232578561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77526190.

The product of its digits is 100800, while the sum is 39.

The square root of 232578561 is about 15250.5265810725. The cubic root of 232578561 is about 614.9737235121.

The spelling of 232578561 in words is "two hundred thirty-two million, five hundred seventy-eight thousand, five hundred sixty-one".