51000492 has 12 divisors (see below), whose sum is σ = 119001176. Its totient is φ = 17000160.

The previous prime is 51000491. The next prime is 51000511. The reversal of 51000492 is 29400015.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51000491) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2125009 + ... + 2125032.

Almost surely, 2^51000492 is an apocalyptic number.

It is an amenable number.

51000492 is an abundant number, since it is smaller than the sum of its proper divisors (68000684).

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

51000492 is a wasteful number, since it uses less digits than its factorization.

51000492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250048 (or 4250046 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 51000492 is about 7141.4628753498. The cubic root of 51000492 is about 370.8441694375.

The spelling of 51000492 in words is "fifty-one million, four hundred ninety-two", and thus it is an aban number.