51500151 has 32 divisors (see below), whose sum is σ = 80363520. Its totient is φ = 32532192.

The previous prime is 51500147. The next prime is 51500159. The reversal of 51500151 is 15100515.

51500151 is a `hidden beast` number, since 515 + 0 + 0 + 151 = 666.

It is not a de Polignac number, because 51500151 - 2² = 51500147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51500159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78541 + ... + 79193.

It is an arithmetic number, because the mean of its divisors is an integer number (2511360).

Almost surely, 2^51500151 is an apocalyptic number.

51500151 is a deficient number, since it is larger than the sum of its proper divisors (28863369).

51500151 is a wasteful number, since it uses less digits than its factorization.

51500151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 51500151 is about 7176.3605678645. The cubic root of 51500151 is about 372.0513066591.

Adding to 51500151 its reverse (15100515), we get a palindrome (66600666).

The spelling of 51500151 in words is "fifty-one million, five hundred thousand, one hundred fifty-one".