51499971 has 6 divisors (see below), whose sum is σ = 74388860. Its totient is φ = 34333308.

The previous prime is 51499963. The next prime is 51499997. The reversal of 51499971 is 17999415.

51499971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51499971 - 2³ = 51499963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51499951) 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 5 ways as a sum of consecutive naturals, for example, 2861101 + ... + 2861118.

Almost surely, 2^51499971 is an apocalyptic number.

51499971 is a deficient number, since it is larger than the sum of its proper divisors (22888889).

51499971 is a wasteful number, since it uses less digits than its factorization.

51499971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722225 (or 5722222 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 51499971 is about 7176.3480266776. The cubic root of 51499971 is about 372.0508732020.

The spelling of 51499971 in words is "fifty-one million, four hundred ninety-nine thousand, nine hundred seventy-one".