51499836 has 36 divisors (see below), whose sum is σ = 130585000. Its totient is φ = 17113248.

The previous prime is 51499831. The next prime is 51499837. The reversal of 51499836 is 63899415.

It is a happy number.

51499836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 51499791 and 51499800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51499831) 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 11 ways as a sum of consecutive naturals, for example, 10515 + ... + 14613.

Almost surely, 2^51499836 is an apocalyptic number.

It is an amenable number.

51499836 is an abundant number, since it is smaller than the sum of its proper divisors (79085164).

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

51499836 is a wasteful number, since it uses less digits than its factorization.

51499836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458 (or 4453 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 51499836 is about 7176.3386207731. The cubic root of 51499836 is about 372.0505481086.

The spelling of 51499836 in words is "fifty-one million, four hundred ninety-nine thousand, eight hundred thirty-six".