51251200165 has 8 divisors (see below), whose sum is σ = 67092480288. Its totient is φ = 37273600080.

The previous prime is 51251200157. The next prime is 51251200207. The reversal of 51251200165 is 56100215215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51251200165 - 2³ = 51251200157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465919947 + ... + 465920056.

It is an arithmetic number, because the mean of its divisors is an integer number (8386560036).

Almost surely, 2^51251200165 is an apocalyptic number.

51251200165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51251200165 is a deficient number, since it is larger than the sum of its proper divisors (15841280123).

51251200165 is a wasteful number, since it uses less digits than its factorization.

51251200165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931840019.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 51251200165 in words is "fifty-one billion, two hundred fifty-one million, two hundred thousand, one hundred sixty-five".