51113457 has 24 divisors (see below), whose sum is σ = 78459680. Its totient is φ = 32886000.

The previous prime is 51113431. The next prime is 51113459. The reversal of 51113457 is 75431115.

It is not a de Polignac number, because 51113457 - 2²³ = 42724849 is a prime.

It is a super-2 number, since 2×51113457² = 5225170972981698, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51113457.

It is not an unprimeable number, because it can be changed into a prime (51113459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21582 + ... + 23832.

Almost surely, 2^51113457 is an apocalyptic number.

It is an amenable number.

51113457 is a deficient number, since it is larger than the sum of its proper divisors (27346223).

51113457 is a wasteful number, since it uses less digits than its factorization.

51113457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2283 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 51113457 is about 7149.3675944100. The cubic root of 51113457 is about 371.1177714996.

The spelling of 51113457 in words is "fifty-one million, one hundred thirteen thousand, four hundred fifty-seven".