51392685 has 16 divisors (see below), whose sum is σ = 83457216. Its totient is φ = 26999808.

The previous prime is 51392681. The next prime is 51392689. The reversal of 51392685 is 58629315.

It is an interprime number because it is at equal distance from previous prime (51392681) and next prime (51392689).

It is not a de Polignac number, because 51392685 - 2² = 51392681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51392681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24564 + ... + 26573.

It is an arithmetic number, because the mean of its divisors is an integer number (5216076).

Almost surely, 2^51392685 is an apocalyptic number.

It is an amenable number.

51392685 is a deficient number, since it is larger than the sum of its proper divisors (32064531).

51392685 is a wasteful number, since it uses less digits than its factorization.

51392685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51212.

The product of its digits is 64800, while the sum is 39.

The square root of 51392685 is about 7168.8691576845. The cubic root of 51392685 is about 371.7923384286.

The spelling of 51392685 in words is "fifty-one million, three hundred ninety-two thousand, six hundred eighty-five".