51702065 has 4 divisors (see below), whose sum is σ = 62042484. Its totient is φ = 41361648.

The previous prime is 51702029. The next prime is 51702071. The reversal of 51702065 is 56020715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33918976 + 17783089 = 5824^2 + 4217^2 .

It is a cyclic number.

It is not a de Polignac number, because 51702065 - 2²⁴ = 34924849 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 5170202 + ... + 5170211.

It is an arithmetic number, because the mean of its divisors is an integer number (15510621).

Almost surely, 2^51702065 is an apocalyptic number.

It is an amenable number.

51702065 is a deficient number, since it is larger than the sum of its proper divisors (10340419).

51702065 is a wasteful number, since it uses less digits than its factorization.

51702065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340418.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 51702065 is about 7190.4148002740. The cubic root of 51702065 is about 372.5369000876.

The spelling of 51702065 in words is "fifty-one million, seven hundred two thousand, sixty-five".