51117090 has 16 divisors (see below), whose sum is σ = 122681088. Its totient is φ = 13631216.

The previous prime is 51117083. The next prime is 51117103. The reversal of 51117090 is 9071115.

51117090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51117090² = 5225913780136200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51117090.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 851922 + ... + 851981.

It is an arithmetic number, because the mean of its divisors is an integer number (7667568).

Almost surely, 2^51117090 is an apocalyptic number.

51117090 is an abundant number, since it is smaller than the sum of its proper divisors (71563998).

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

51117090 is a wasteful number, since it uses less digits than its factorization.

51117090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703913.

The product of its (nonzero) digits is 315, while the sum is 24.

The square root of 51117090 is about 7149.6216683122. The cubic root of 51117090 is about 371.1265639585.

The spelling of 51117090 in words is "fifty-one million, one hundred seventeen thousand, ninety".