51476985 has 128 divisors (see below), whose sum is σ = 114278400. Its totient is φ = 21461760.

The previous prime is 51476981. The next prime is 51476987. The reversal of 51476985 is 58967415.

It is not a de Polignac number, because 51476985 - 2² = 51476981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51476985.

It is not an unprimeable number, because it can be changed into a prime (51476981) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 843855 + ... + 843915.

It is an arithmetic number, because the mean of its divisors is an integer number (892800).

Almost surely, 2^51476985 is an apocalyptic number.

It is an amenable number.

51476985 is an abundant number, since it is smaller than the sum of its proper divisors (62801415).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51476985 is a wasteful number, since it uses less digits than its factorization.

51476985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 142 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 51476985 is about 7174.7463369794. The cubic root of 51476985 is about 371.9955124329.

The spelling of 51476985 in words is "fifty-one million, four hundred seventy-six thousand, nine hundred eighty-five".