231630577 has 4 divisors (see below), whose sum is σ = 243821680. Its totient is φ = 219439476.

The previous prime is 231630563. The next prime is 231630583. The reversal of 231630577 is 775036132.

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 a cyclic number.

It is not a de Polignac number, because 231630577 - 2²³ = 223241969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231630557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6095523 + ... + 6095560.

It is an arithmetic number, because the mean of its divisors is an integer number (60955420).

Almost surely, 2^231630577 is an apocalyptic number.

It is an amenable number.

231630577 is a deficient number, since it is larger than the sum of its proper divisors (12191103).

231630577 is a wasteful number, since it uses less digits than its factorization.

231630577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12191102.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 231630577 is about 15219.4144762537. The cubic root of 231630577 is about 614.1370469017.

The spelling of 231630577 in words is "two hundred thirty-one million, six hundred thirty thousand, five hundred seventy-seven".