51890871 has 16 divisors (see below), whose sum is σ = 71594208. Its totient is φ = 33408000.

The previous prime is 51890863. The next prime is 51890893. The reversal of 51890871 is 17809815.

It is not a de Polignac number, because 51890871 - 2³ = 51890863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51890801) 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, 10335 + ... + 14511.

It is an arithmetic number, because the mean of its divisors is an integer number (4474638).

Almost surely, 2^51890871 is an apocalyptic number.

51890871 is a deficient number, since it is larger than the sum of its proper divisors (19703337).

51890871 is a wasteful number, since it uses less digits than its factorization.

51890871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 51890871 is about 7203.5318420897. The cubic root of 51890871 is about 372.9898269093.

The spelling of 51890871 in words is "fifty-one million, eight hundred ninety thousand, eight hundred seventy-one".