51902418 has 16 divisors (see below), whose sum is σ = 105564960. Its totient is φ = 17007456.

The previous prime is 51902393. The next prime is 51902437. The reversal of 51902418 is 81420915.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72955 + ... + 73662.

It is an arithmetic number, because the mean of its divisors is an integer number (6597810).

Almost surely, 2^51902418 is an apocalyptic number.

51902418 is an abundant number, since it is smaller than the sum of its proper divisors (53662542).

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

51902418 is a wasteful number, since it uses less digits than its factorization.

51902418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146681.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 51902418 is about 7204.3332793535. Note that the first 3 decimals coincide. The cubic root of 51902418 is about 373.0174913393.

The spelling of 51902418 in words is "fifty-one million, nine hundred two thousand, four hundred eighteen".