51000147 has 12 divisors (see below), whose sum is σ = 80364024. Its totient is φ = 30909120.

The previous prime is 51000139. The next prime is 51000163. The reversal of 51000147 is 74100015.

It is not a de Polignac number, because 51000147 - 2³ = 51000139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51000127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257478 + ... + 257675.

It is an arithmetic number, because the mean of its divisors is an integer number (6697002).

Almost surely, 2^51000147 is an apocalyptic number.

51000147 is a deficient number, since it is larger than the sum of its proper divisors (29363877).

51000147 is a wasteful number, since it uses less digits than its factorization.

51000147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515170 (or 515167 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 51000147 is about 7141.4387205941. The cubic root of 51000147 is about 370.8433332264.

The spelling of 51000147 in words is "fifty-one million, one hundred forty-seven", and thus it is an aban number.