51312006 has 24 divisors (see below), whose sum is σ = 114763584. Its totient is φ = 16552080.

The previous prime is 51311993. The next prime is 51312031. The reversal of 51312006 is 60021315.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 51312006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45421 + ... + 46536.

It is an arithmetic number, because the mean of its divisors is an integer number (4781816).

Almost surely, 2^51312006 is an apocalyptic number.

51312006 is an abundant number, since it is smaller than the sum of its proper divisors (63451578).

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

51312006 is a wasteful number, since it uses less digits than its factorization.

51312006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91996 (or 91993 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 51312006 is about 7163.2399094265. The cubic root of 51312006 is about 371.5976833324.

It can be divided in two parts, 5131200 and 6, that added together give a triangular number (5131206 = T₃₂₀₃).

The spelling of 51312006 in words is "fifty-one million, three hundred twelve thousand, six".