51692087 has 4 divisors (see below), whose sum is σ = 54732816. Its totient is φ = 48651360.

The previous prime is 51692033. The next prime is 51692089. The reversal of 51692087 is 78029615.

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

It is a cyclic number.

It is not a de Polignac number, because 51692087 - 2⁸ = 51691831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51692087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51692089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520339 + ... + 1520372.

It is an arithmetic number, because the mean of its divisors is an integer number (13683204).

Almost surely, 2^51692087 is an apocalyptic number.

51692087 is a deficient number, since it is larger than the sum of its proper divisors (3040729).

51692087 is a wasteful number, since it uses less digits than its factorization.

51692087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040728.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 51692087 is about 7189.7209264338. The cubic root of 51692087 is about 372.5129332026.

The spelling of 51692087 in words is "fifty-one million, six hundred ninety-two thousand, eighty-seven".