51297493 has 8 divisors (see below), whose sum is σ = 55452600. Its totient is φ = 47172288.

The previous prime is 51297487. The next prime is 51297497. The reversal of 51297493 is 39479215.

It can be written as a sum of positive squares in 4 ways, for example, as 3249 + 51294244 = 57^2 + 7162^2 .

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 51297493 - 2²¹ = 49200341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51297497) 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, 3838 + ... + 10831.

It is an arithmetic number, because the mean of its divisors is an integer number (6931575).

Almost surely, 2^51297493 is an apocalyptic number.

It is an amenable number.

51297493 is a deficient number, since it is larger than the sum of its proper divisors (4155107).

51297493 is a wasteful number, since it uses less digits than its factorization.

51297493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14951.

The product of its digits is 68040, while the sum is 40.

The square root of 51297493 is about 7162.2268185251. The cubic root of 51297493 is about 371.5626460112.

The spelling of 51297493 in words is "fifty-one million, two hundred ninety-seven thousand, four hundred ninety-three".