15797251 has 4 divisors (see below), whose sum is σ = 16484112. Its totient is φ = 15110392.

The previous prime is 15797237. The next prime is 15797263. The reversal of 15797251 is 15279751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15797251 - 2¹⁹ = 15272963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15797251.

It is not an unprimeable number, because it can be changed into a prime (15797291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343396 + ... + 343441.

It is an arithmetic number, because the mean of its divisors is an integer number (4121028).

Almost surely, 2^15797251 is an apocalyptic number.

15797251 is the 2125-th centered heptagonal number.

15797251 is a deficient number, since it is larger than the sum of its proper divisors (686861).

15797251 is an equidigital number, since it uses as much as digits as its factorization.

15797251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686860.

The product of its digits is 22050, while the sum is 37.

The square root of 15797251 is about 3974.5755748256. The cubic root of 15797251 is about 250.9153166915.

The spelling of 15797251 in words is "fifteen million, seven hundred ninety-seven thousand, two hundred fifty-one".