51056501 has 4 divisors (see below), whose sum is σ = 52817100. Its totient is φ = 49295904.

The previous prime is 51056471. The next prime is 51056513. The reversal of 51056501 is 10565015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10565015 = 5 ⋅2113003.

It can be written as a sum of positive squares in 2 ways, for example, as 27300625 + 23755876 = 5225^2 + 4874^2 .

It is a cyclic number.

It is not a de Polignac number, because 51056501 - 2²² = 46862197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056531) 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, 880256 + ... + 880313.

It is an arithmetic number, because the mean of its divisors is an integer number (13204275).

Almost surely, 2^51056501 is an apocalyptic number.

It is an amenable number.

51056501 is a deficient number, since it is larger than the sum of its proper divisors (1760599).

51056501 is a wasteful number, since it uses less digits than its factorization.

51056501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760598.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 51056501 is about 7145.3831947629. The cubic root of 51056501 is about 370.9798740908.

The spelling of 51056501 in words is "fifty-one million, fifty-six thousand, five hundred one".