2715556321 has 15 divisors (see below), whose sum is σ = 2876130165. Its totient is φ = 2563861200.

The previous prime is 2715556289. The next prime is 2715556331. The reversal of 2715556321 is 1236555172.

The square root of 2715556321 is 52111.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 2217373921 + 498182400 = 47089^2 + 22320^2 .

It is not a de Polignac number, because 2715556321 - 2⁵ = 2715556289 is a prime.

It is a super-2 number, since 2×2715556321² = 14748492265046110082, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (63000) is a multiple of the sum of its prime divisors (72).

It is not an unprimeable number, because it can be changed into a prime (2715556331) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 66233061 + ... + 66233101.

It is an arithmetic number, because the mean of its divisors is an integer number (191742011).

Almost surely, 2^2715556321 is an apocalyptic number.

2715556321 is the 52111-st square number.

2715556321 is the 26056-th centered octagonal number.

It is an amenable number.

2715556321 is a deficient number, since it is larger than the sum of its proper divisors (160573844).

2715556321 is an frugal number, since it uses more digits than its factorization.

2715556321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 72 counting only the distinct ones).

The product of its digits is 63000, while the sum is 37.

The cubic root of 2715556321 is about 1395.1458283765.

The spelling of 2715556321 in words is "two billion, seven hundred fifteen million, five hundred fifty-six thousand, three hundred twenty-one".