51539291 has 8 divisors (see below), whose sum is σ = 54879120. Its totient is φ = 48233728.

The previous prime is 51539269. The next prime is 51539303. The reversal of 51539291 is 19293515.

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

It is a cyclic number.

It is not a de Polignac number, because 51539291 - 2⁶ = 51539227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51539491) 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, 5426 + ... + 11511.

It is an arithmetic number, because the mean of its divisors is an integer number (6859890).

Almost surely, 2^51539291 is an apocalyptic number.

51539291 is a deficient number, since it is larger than the sum of its proper divisors (3339829).

51539291 is a wasteful number, since it uses less digits than its factorization.

51539291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133.

The product of its digits is 12150, while the sum is 35.

The square root of 51539291 is about 7179.0870589512. The cubic root of 51539291 is about 372.1455355132.

The spelling of 51539291 in words is "fifty-one million, five hundred thirty-nine thousand, two hundred ninety-one".