51901893 has 18 divisors (see below), whose sum is σ = 76447826. Its totient is φ = 33931872.

The previous prime is 51901879. The next prime is 51901897. The reversal of 51901893 is 39810915.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 17994564 + 33907329 = 4242^2 + 5823^2 .

It is not a de Polignac number, because 51901893 - 2⁴ = 51901877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51901897) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24255 + ... + 26307.

Almost surely, 2^51901893 is an apocalyptic number.

51901893 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51901893 is a deficient number, since it is larger than the sum of its proper divisors (24545933).

51901893 is a wasteful number, since it uses less digits than its factorization.

51901893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 51901893 is about 7204.2968428570. The cubic root of 51901893 is about 373.0162336276.

The spelling of 51901893 in words is "fifty-one million, nine hundred one thousand, eight hundred ninety-three".