51064457 has 4 divisors (see below), whose sum is σ = 53752080. Its totient is φ = 48376836.

The previous prime is 51064451. The next prime is 51064459. The reversal of 51064457 is 75446015.

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 51064457 - 2⁸ = 51064201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51064451) 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, 1343783 + ... + 1343820.

It is an arithmetic number, because the mean of its divisors is an integer number (13438020).

Almost surely, 2^51064457 is an apocalyptic number.

It is an amenable number.

51064457 is a deficient number, since it is larger than the sum of its proper divisors (2687623).

51064457 is a wasteful number, since it uses less digits than its factorization.

51064457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687622.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 51064457 is about 7145.9398961928. The cubic root of 51064457 is about 370.9991426953. Note that the first 3 decimals are identical.

The spelling of 51064457 in words is "fifty-one million, sixty-four thousand, four hundred fifty-seven".