51539049 has 6 divisors (see below), whose sum is σ = 74445306. Its totient is φ = 34359360.

The previous prime is 51539041. The next prime is 51539057. The reversal of 51539049 is 94093515.

It is an interprime number because it is at equal distance from previous prime (51539041) and next prime (51539057).

It can be written as a sum of positive squares in only one way, i.e., 34892649 + 16646400 = 5907^2 + 4080^2 .

It is not a de Polignac number, because 51539049 - 2³ = 51539041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51539041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2863272 + ... + 2863289.

It is an arithmetic number, because the mean of its divisors is an integer number (12407551).

Almost surely, 2^51539049 is an apocalyptic number.

It is an amenable number.

51539049 is a deficient number, since it is larger than the sum of its proper divisors (22906257).

51539049 is a wasteful number, since it uses less digits than its factorization.

51539049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726567 (or 5726564 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 51539049 is about 7179.0702044206. The cubic root of 51539049 is about 372.1449530491.

The spelling of 51539049 in words is "fifty-one million, five hundred thirty-nine thousand, forty-nine".