51906015 has 96 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 22270464.

The previous prime is 51906013. The next prime is 51906061. The reversal of 51906015 is 51060915.

51906015 is a `hidden beast` number, since 51 + 9 + 0 + 601 + 5 = 666.

51906015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51906015 - 2¹ = 51906013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51906015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51906013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 144406 + ... + 144764.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^51906015 is an apocalyptic number.

51906015 is an abundant number, since it is smaller than the sum of its proper divisors (61312545).

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

51906015 is a wasteful number, since it uses less digits than its factorization.

51906015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 51906015 is about 7204.5829164498. The cubic root of 51906015 is about 373.0261082334.

The spelling of 51906015 in words is "fifty-one million, nine hundred six thousand, fifteen".