245631657 has 16 divisors (see below), whose sum is σ = 347474880. Its totient is φ = 153810432.

The previous prime is 245631649. The next prime is 245631667. The reversal of 245631657 is 756136542.

It is not a de Polignac number, because 245631657 - 2³ = 245631649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245631637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22069 + ... + 31277.

It is an arithmetic number, because the mean of its divisors is an integer number (21717180).

Almost surely, 2^245631657 is an apocalyptic number.

It is an amenable number.

245631657 is a deficient number, since it is larger than the sum of its proper divisors (101843223).

245631657 is a wasteful number, since it uses less digits than its factorization.

245631657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9752.

The product of its digits is 151200, while the sum is 39.

The square root of 245631657 is about 15672.6403965637. The cubic root of 245631657 is about 626.2697658711.

The spelling of 245631657 in words is "two hundred forty-five million, six hundred thirty-one thousand, six hundred fifty-seven".