51511475 has 12 divisors (see below), whose sum is σ = 64136520. Its totient is φ = 41040000.

The previous prime is 51511459. The next prime is 51511477. The reversal of 51511475 is 57411515.

It is not a de Polignac number, because 51511475 - 2⁴ = 51511459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51511477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2171 + ... + 10379.

It is an arithmetic number, because the mean of its divisors is an integer number (5344710).

Almost surely, 2^51511475 is an apocalyptic number.

51511475 is a deficient number, since it is larger than the sum of its proper divisors (12625045).

51511475 is a wasteful number, since it uses less digits than its factorization.

51511475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470 (or 8465 counting only the distinct ones).

The product of its digits is 3500, while the sum is 29.

The square root of 51511475 is about 7177.1495038072. The cubic root of 51511475 is about 372.0785738946.

The spelling of 51511475 in words is "fifty-one million, five hundred eleven thousand, four hundred seventy-five".