51951865 has 16 divisors (see below), whose sum is σ = 71366400. Its totient is φ = 35565120.

The previous prime is 51951859. The next prime is 51951883. The reversal of 51951865 is 56815915.

It is not a de Polignac number, because 51951865 - 2¹³ = 51943673 is a prime.

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, 36436 + ... + 37834.

It is an arithmetic number, because the mean of its divisors is an integer number (4460400).

Almost surely, 2^51951865 is an apocalyptic number.

It is an amenable number.

51951865 is a deficient number, since it is larger than the sum of its proper divisors (19414535).

51951865 is a wasteful number, since it uses less digits than its factorization.

51951865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472.

The product of its digits is 54000, while the sum is 40.

The square root of 51951865 is about 7207.7642164544. The cubic root of 51951865 is about 373.1359106241.

The spelling of 51951865 in words is "fifty-one million, nine hundred fifty-one thousand, eight hundred sixty-five".