51297409 has 8 divisors (see below), whose sum is σ = 52613792. Its totient is φ = 49986720.

The previous prime is 51297377. The next prime is 51297427. The reversal of 51297409 is 90479215.

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 51297409 - 2⁵ = 51297377 is a prime.

It is a super-2 number, since 2×51297409² = 5262848340226562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51297469) 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, 21349 + ... + 23629.

It is an arithmetic number, because the mean of its divisors is an integer number (6576724).

Almost surely, 2^51297409 is an apocalyptic number.

It is an amenable number.

51297409 is a deficient number, since it is larger than the sum of its proper divisors (1316383).

51297409 is a wasteful number, since it uses less digits than its factorization.

51297409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 51297409 is about 7162.2209544247. The cubic root of 51297409 is about 371.5624431989.

The spelling of 51297409 in words is "fifty-one million, two hundred ninety-seven thousand, four hundred nine".