51531963 has 16 divisors (see below), whose sum is σ = 78710016. Its totient is φ = 29377440.

The previous prime is 51531943. The next prime is 51531989. The reversal of 51531963 is 36913515.

It is not a de Polignac number, because 51531963 - 2⁶ = 51531899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51531943) 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, 7020 + ... + 12342.

It is an arithmetic number, because the mean of its divisors is an integer number (4919376).

Almost surely, 2^51531963 is an apocalyptic number.

51531963 is a deficient number, since it is larger than the sum of its proper divisors (27178053).

51531963 is a wasteful number, since it uses less digits than its factorization.

51531963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794.

The product of its digits is 12150, while the sum is 33.

The square root of 51531963 is about 7178.5766695077. The cubic root of 51531963 is about 372.1278971142.

The spelling of 51531963 in words is "fifty-one million, five hundred thirty-one thousand, nine hundred sixty-three".