51364494 has 24 divisors (see below), whose sum is σ = 112334040. Its totient is φ = 16960848.

The previous prime is 51364493. The next prime is 51364499. The reversal of 51364494 is 49446315.

51364494 is a `hidden beast` number, since 5 + 1 + 3 + 644 + 9 + 4 = 666.

51364494 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 2×51364494² = 5276622487752072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51364493) 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, 11409 + ... + 15260.

It is an arithmetic number, because the mean of its divisors is an integer number (4680585).

Almost surely, 2^51364494 is an apocalyptic number.

51364494 is an abundant number, since it is smaller than the sum of its proper divisors (60969546).

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

51364494 is a wasteful number, since it uses less digits than its factorization.

51364494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26784 (or 26781 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 51364494 is about 7166.9026782844. The cubic root of 51364494 is about 371.7243448685.

The spelling of 51364494 in words is "fifty-one million, three hundred sixty-four thousand, four hundred ninety-four".