51275685 has 16 divisors (see below), whose sum is σ = 83387520. Its totient is φ = 26898240.

The previous prime is 51275681. The next prime is 51275687. The reversal of 51275685 is 58657215.

It is not a de Polignac number, because 51275685 - 2² = 51275681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51275681) 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, 27105 + ... + 28934.

It is an arithmetic number, because the mean of its divisors is an integer number (5211720).

Almost surely, 2^51275685 is an apocalyptic number.

It is an amenable number.

51275685 is a deficient number, since it is larger than the sum of its proper divisors (32111835).

51275685 is a wasteful number, since it uses less digits than its factorization.

51275685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56108.

The product of its digits is 84000, while the sum is 39.

The square root of 51275685 is about 7160.7042251443. The cubic root of 51275685 is about 371.5099846545.

The spelling of 51275685 in words is "fifty-one million, two hundred seventy-five thousand, six hundred eighty-five".