51508534 has 32 divisors (see below), whose sum is σ = 97977600. Its totient is φ = 19724640.

The previous prime is 51508531. The next prime is 51508537. The reversal of 51508534 is 43580515.

It is an interprime number because it is at equal distance from previous prime (51508531) and next prime (51508537).

It is a junction number, because it is equal to n+sod(n) for n = 51508496 and 51508505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51508531) 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, 6252 + ... + 11920.

It is an arithmetic number, because the mean of its divisors is an integer number (3061800).

Almost surely, 2^51508534 is an apocalyptic number.

51508534 is a deficient number, since it is larger than the sum of its proper divisors (46469066).

51508534 is a wasteful number, since it uses less digits than its factorization.

51508534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5748.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 51508534 is about 7176.9446145278. The cubic root of 51508534 is about 372.0714925992.

The spelling of 51508534 in words is "fifty-one million, five hundred eight thousand, five hundred thirty-four".