51404136 has 48 divisors (see below), whose sum is σ = 149495040. Its totient is φ = 14686560.

The previous prime is 51404099. The next prime is 51404159. The reversal of 51404136 is 63140415.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20680 + ... + 23031.

It is an arithmetic number, because the mean of its divisors is an integer number (3114480).

Almost surely, 2^51404136 is an apocalyptic number.

51404136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51404136 is an abundant number, since it is smaller than the sum of its proper divisors (98090904).

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

51404136 is a wasteful number, since it uses less digits than its factorization.

51404136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43734 (or 43723 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51404136 is about 7169.6677747299. The cubic root of 51404136 is about 371.8199498673.

The spelling of 51404136 in words is "fifty-one million, four hundred four thousand, one hundred thirty-six".