51231075 has 24 divisors (see below), whose sum is σ = 96803328. Its totient is φ = 23419680.

The previous prime is 51231073. The next prime is 51231083. The reversal of 51231075 is 57013215.

It is not a de Polignac number, because 51231075 - 2¹ = 51231073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51231073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48267 + ... + 49316.

It is an arithmetic number, because the mean of its divisors is an integer number (4033472).

Almost surely, 2^51231075 is an apocalyptic number.

51231075 is a deficient number, since it is larger than the sum of its proper divisors (45572253).

51231075 is a wasteful number, since it uses less digits than its factorization.

51231075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97603 (or 97598 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 51231075 is about 7157.5886302581. The cubic root of 51231075 is about 371.4022151276.

The spelling of 51231075 in words is "fifty-one million, two hundred thirty-one thousand, seventy-five".