51538873 has 2 divisors, whose sum is σ = 51538874. Its totient is φ = 51538872.

The previous prime is 51538859. The next prime is 51538967. The reversal of 51538873 is 37883515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48483369 + 3055504 = 6963^2 + 1748^2 .

It is a cyclic number.

It is not a de Polignac number, because 51538873 - 2⁵ = 51538841 is a prime.

It is a super-2 number, since 2×51538873² = 5312510860220258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51538813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25769436 + 25769437.

It is an arithmetic number, because the mean of its divisors is an integer number (25769437).

Almost surely, 2^51538873 is an apocalyptic number.

It is an amenable number.

51538873 is a deficient number, since it is larger than the sum of its proper divisors (1).

51538873 is an equidigital number, since it uses as much as digits as its factorization.

51538873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 51538873 is about 7179.0579465554. The cubic root of 51538873 is about 372.1445294377.

The spelling of 51538873 in words is "fifty-one million, five hundred thirty-eight thousand, eight hundred seventy-three".