51319655 has 16 divisors (see below), whose sum is σ = 62832000. Its totient is φ = 40230432.

The previous prime is 51319621. The next prime is 51319669. The reversal of 51319655 is 55691315.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51319655 - 2²⁰ = 50271079 is a prime.

It is a congruent 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, 102596 + ... + 103094.

It is an arithmetic number, because the mean of its divisors is an integer number (3927000).

Almost surely, 2^51319655 is an apocalyptic number.

51319655 is a deficient number, since it is larger than the sum of its proper divisors (11512345).

51319655 is a wasteful number, since it uses less digits than its factorization.

51319655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878.

The product of its digits is 20250, while the sum is 35.

The square root of 51319655 is about 7163.7737959821. The cubic root of 51319655 is about 371.6161469090.

The spelling of 51319655 in words is "fifty-one million, three hundred nineteen thousand, six hundred fifty-five".