63217457 has 4 divisors (see below), whose sum is σ = 63496176. Its totient is φ = 62938740.

The previous prime is 63217447. The next prime is 63217471. The reversal of 63217457 is 75471236.

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 63217457 - 2²⁴ = 46440241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63217447) 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, 139019 + ... + 139472.

It is an arithmetic number, because the mean of its divisors is an integer number (15874044).

Almost surely, 2^63217457 is an apocalyptic number.

It is an amenable number.

63217457 is a deficient number, since it is larger than the sum of its proper divisors (278719).

63217457 is a wasteful number, since it uses less digits than its factorization.

63217457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278718.

The product of its digits is 35280, while the sum is 35.

The square root of 63217457 is about 7950.9406361763. The cubic root of 63217457 is about 398.3630118971.

The spelling of 63217457 in words is "sixty-three million, two hundred seventeen thousand, four hundred fifty-seven".