51707140 has 12 divisors (see below), whose sum is σ = 108585036. Its totient is φ = 20682848.

The previous prime is 51707137. The next prime is 51707153. The reversal of 51707140 is 4170715.

It can be written as a sum of positive squares in 2 ways, for example, as 35450116 + 16257024 = 5954^2 + 4032^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292659 + ... + 1292698.

It is an arithmetic number, because the mean of its divisors is an integer number (9048753).

Almost surely, 2^51707140 is an apocalyptic number.

It is an amenable number.

51707140 is an abundant number, since it is smaller than the sum of its proper divisors (56877896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51707140 is a wasteful number, since it uses less digits than its factorization.

51707140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585366 (or 2585364 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 51707140 is about 7190.7676919784. The cubic root of 51707140 is about 372.5490889168.

Adding to 51707140 its reverse (4170715), we get a palindrome (55877855).

The spelling of 51707140 in words is "fifty-one million, seven hundred seven thousand, one hundred forty".