51539199 has 8 divisors (see below), whose sum is σ = 69244032. Its totient is φ = 34096920.

The previous prime is 51539197. The next prime is 51539227. The reversal of 51539199 is 99193515.

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

It is not a de Polignac number, because 51539199 - 2¹ = 51539197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51539199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51539197) 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, 65179 + ... + 65964.

It is an arithmetic number, because the mean of its divisors is an integer number (8655504).

Almost surely, 2^51539199 is an apocalyptic number.

51539199 is a deficient number, since it is larger than the sum of its proper divisors (17704833).

51539199 is a wasteful number, since it uses less digits than its factorization.

51539199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131277.

The product of its digits is 54675, while the sum is 42.

The square root of 51539199 is about 7179.0806514483. The cubic root of 51539199 is about 372.1453140808.

The spelling of 51539199 in words is "fifty-one million, five hundred thirty-nine thousand, one hundred ninety-nine".