231213577 has 8 divisors (see below), whose sum is σ = 264342656. Its totient is φ = 198109152.

The previous prime is 231213571. The next prime is 231213601. The reversal of 231213577 is 775312132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231213577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231213571) 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, 23413 + ... + 31789.

It is an arithmetic number, because the mean of its divisors is an integer number (33042832).

Almost surely, 2^231213577 is an apocalyptic number.

It is an amenable number.

231213577 is a deficient number, since it is larger than the sum of its proper divisors (33129079).

231213577 is an equidigital number, since it uses as much as digits as its factorization.

231213577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12327.

The product of its digits is 8820, while the sum is 31.

The square root of 231213577 is about 15205.7086977227. The cubic root of 231213577 is about 613.7682858817.

The spelling of 231213577 in words is "two hundred thirty-one million, two hundred thirteen thousand, five hundred seventy-seven".