51702891 has 4 divisors (see below), whose sum is σ = 68937192. Its totient is φ = 34468592.

The previous prime is 51702883. The next prime is 51702901. The reversal of 51702891 is 19820715.

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 51702891 - 2³ = 51702883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51702991) 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, 8617146 + ... + 8617151.

It is an arithmetic number, because the mean of its divisors is an integer number (17234298).

Almost surely, 2^51702891 is an apocalyptic number.

51702891 is a deficient number, since it is larger than the sum of its proper divisors (17234301).

51702891 is a wasteful number, since it uses less digits than its factorization.

51702891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17234300.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 51702891 is about 7190.4722376211. The cubic root of 51702891 is about 372.5388839790.

The spelling of 51702891 in words is "fifty-one million, seven hundred two thousand, eight hundred ninety-one".