51510745 has 16 divisors (see below), whose sum is σ = 72620352. Its totient is φ = 34580160.

The previous prime is 51510737. The next prime is 51510761. The reversal of 51510745 is 54701515.

It is not a de Polignac number, because 51510745 - 2³ = 51510737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35307 + ... + 36736.

It is an arithmetic number, because the mean of its divisors is an integer number (4538772).

Almost surely, 2^51510745 is an apocalyptic number.

51510745 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51510745 is a deficient number, since it is larger than the sum of its proper divisors (21109607).

51510745 is a wasteful number, since it uses less digits than its factorization.

51510745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72072.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 51510745 is about 7177.0986477824. The cubic root of 51510745 is about 372.0768162368.

The spelling of 51510745 in words is "fifty-one million, five hundred ten thousand, seven hundred forty-five".