63581057 has 4 divisors (see below), whose sum is σ = 64530096. Its totient is φ = 62632020.

The previous prime is 63581053. The next prime is 63581069. The reversal of 63581057 is 75018536.

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 63581057 - 2² = 63581053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63581053) 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, 474419 + ... + 474552.

It is an arithmetic number, because the mean of its divisors is an integer number (16132524).

Almost surely, 2^63581057 is an apocalyptic number.

63581057 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

63581057 is a deficient number, since it is larger than the sum of its proper divisors (949039).

63581057 is an equidigital number, since it uses as much as digits as its factorization.

63581057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949038.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 63581057 is about 7973.7730717647. The cubic root of 63581057 is about 399.1252906867.

The spelling of 63581057 in words is "sixty-three million, five hundred eighty-one thousand, fifty-seven".