51513406 has 24 divisors (see below), whose sum is σ = 90140256. Its totient is φ = 22014720.

The previous prime is 51513391. The next prime is 51513433. The reversal of 51513406 is 60431515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56091 + ... + 57001.

It is an arithmetic number, because the mean of its divisors is an integer number (3755844).

Almost surely, 2^51513406 is an apocalyptic number.

51513406 is a deficient number, since it is larger than the sum of its proper divisors (38626850).

51513406 is a wasteful number, since it uses less digits than its factorization.

51513406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51513406 is about 7177.2840267054. The cubic root of 51513406 is about 372.0832231807.

It can be divided in two parts, 51513 and 406, that multiplied together give a triangular number (20914278 = T₆₄₆₇).

The spelling of 51513406 in words is "fifty-one million, five hundred thirteen thousand, four hundred six".