51937893 has 18 divisors (see below), whose sum is σ = 87270534. Its totient is φ = 29678544.

The previous prime is 51937891. The next prime is 51937903. The reversal of 51937893 is 39873915.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40220964 + 11716929 = 6342^2 + 3423^2 .

It is not a de Polignac number, because 51937893 - 2¹ = 51937891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51937891) 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, 58446 + ... + 59327.

It is an arithmetic number, because the mean of its divisors is an integer number (4848363).

Almost surely, 2^51937893 is an apocalyptic number.

It is an amenable number.

51937893 is a deficient number, since it is larger than the sum of its proper divisors (35332641).

51937893 is a wasteful number, since it uses less digits than its factorization.

51937893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117793 (or 117783 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 51937893 is about 7206.7949186861. The cubic root of 51937893 is about 373.1024570777.

The spelling of 51937893 in words is "fifty-one million, nine hundred thirty-seven thousand, eight hundred ninety-three".