51394090 has 32 divisors (see below), whose sum is σ = 104405760. Its totient is φ = 18043200.

The previous prime is 51394067. The next prime is 51394093. The reversal of 51394090 is 9049315.

It is not an unprimeable number, because it can be changed into a prime (51394093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4866 + ... + 11245.

It is an arithmetic number, because the mean of its divisors is an integer number (3262680).

Almost surely, 2^51394090 is an apocalyptic number.

51394090 is an abundant number, since it is smaller than the sum of its proper divisors (53011670).

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

51394090 is a wasteful number, since it uses less digits than its factorization.

51394090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16158.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 51394090 is about 7168.9671501549. The cubic root of 51394090 is about 371.7957264820.

It can be divided in two parts, 5139 and 4090, that added together give a palindrome (9229).

The spelling of 51394090 in words is "fifty-one million, three hundred ninety-four thousand, ninety".