51531485 has 16 divisors (see below), whose sum is σ = 63201600. Its totient is φ = 40323456.

The previous prime is 51531451. The next prime is 51531511. The reversal of 51531485 is 58413515.

It is a cyclic number.

It is not a de Polignac number, because 51531485 - 2²⁰ = 50482909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90281 + ... + 90849.

It is an arithmetic number, because the mean of its divisors is an integer number (3950100).

Almost surely, 2^51531485 is an apocalyptic number.

It is an amenable number.

51531485 is a deficient number, since it is larger than the sum of its proper divisors (11670115).

51531485 is a wasteful number, since it uses less digits than its factorization.

51531485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940.

The product of its digits is 12000, while the sum is 32.

The square root of 51531485 is about 7178.5433759224. The cubic root of 51531485 is about 372.1267465164.

The spelling of 51531485 in words is "fifty-one million, five hundred thirty-one thousand, four hundred eighty-five".