51502645 has 8 divisors (see below), whose sum is σ = 62145720. Its totient is φ = 40973760.

The previous prime is 51502613. The next prime is 51502651. The reversal of 51502645 is 54620515.

It can be written as a sum of positive squares in 4 ways, for example, as 1347921 + 50154724 = 1161^2 + 7082^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51502645 - 2⁵ = 51502613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27550 + ... + 29359.

It is an arithmetic number, because the mean of its divisors is an integer number (7768215).

Almost surely, 2^51502645 is an apocalyptic number.

It is an amenable number.

51502645 is a deficient number, since it is larger than the sum of its proper divisors (10643075).

51502645 is a wasteful number, since it uses less digits than its factorization.

51502645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57095.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 51502645 is about 7176.5343307198. The cubic root of 51502645 is about 372.0573123436.

The spelling of 51502645 in words is "fifty-one million, five hundred two thousand, six hundred forty-five".