51531105 has 24 divisors (see below), whose sum is σ = 84103488. Its totient is φ = 26942656.

The previous prime is 51531079. The next prime is 51531113. The reversal of 51531105 is 50113515.

It is not a de Polignac number, because 51531105 - 2⁷ = 51530977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41524 + ... + 42746.

It is an arithmetic number, because the mean of its divisors is an integer number (3504312).

Almost surely, 2^51531105 is an apocalyptic number.

It is an amenable number.

51531105 is a deficient number, since it is larger than the sum of its proper divisors (32572383).

51531105 is a wasteful number, since it uses less digits than its factorization.

51531105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 51531105 is about 7178.5169081085. The cubic root of 51531105 is about 372.1258318102.

The spelling of 51531105 in words is "fifty-one million, five hundred thirty-one thousand, one hundred five".