51535899 has 8 divisors (see below), whose sum is σ = 76349520. Its totient is φ = 34357248.

The previous prime is 51535877. The next prime is 51535901. The reversal of 51535899 is 99853515.

It is not a de Polignac number, because 51535899 - 2⁵ = 51535867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51535819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954342 + ... + 954395.

It is an arithmetic number, because the mean of its divisors is an integer number (9543690).

Almost surely, 2^51535899 is an apocalyptic number.

51535899 is a deficient number, since it is larger than the sum of its proper divisors (24813621).

51535899 is a wasteful number, since it uses less digits than its factorization.

51535899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908746 (or 1908740 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 51535899 is about 7178.8508133266. The cubic root of 51535899 is about 372.1373712220.

The spelling of 51535899 in words is "fifty-one million, five hundred thirty-five thousand, eight hundred ninety-nine".