51538071 has 12 divisors (see below), whose sum is σ = 74410728. Its totient is φ = 31715424.

The previous prime is 51538063. The next prime is 51538111. The reversal of 51538071 is 17083515.

It is not a de Polignac number, because 51538071 - 2³ = 51538063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50320 + ... + 51333.

It is an arithmetic number, because the mean of its divisors is an integer number (6200894).

Almost surely, 2^51538071 is an apocalyptic number.

51538071 is a deficient number, since it is larger than the sum of its proper divisors (22872657).

51538071 is a wasteful number, since it uses less digits than its factorization.

51538071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101682 (or 101669 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 51538071 is about 7179.0020894272. The cubic root of 51538071 is about 372.1425991054.

Subtracting from 51538071 its sum of digits (30), we obtain a square (51538041 = 7179²).

The spelling of 51538071 in words is "fifty-one million, five hundred thirty-eight thousand, seventy-one".