2531327721 has 32 divisors (see below), whose sum is σ = 3808207872. Its totient is φ = 1483944000.

The previous prime is 2531327719. The next prime is 2531327759. The reversal of 2531327721 is 1277231352.

It is not a de Polignac number, because 2531327721 - 2¹ = 2531327719 is a prime.

It is a super-2 number, since 2×2531327721² = 12815240062206107682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2531327021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219526 + ... + 230768.

It is an arithmetic number, because the mean of its divisors is an integer number (119006496).

Almost surely, 2^2531327721 is an apocalyptic number.

It is an amenable number.

2531327721 is a deficient number, since it is larger than the sum of its proper divisors (1276880151).

2531327721 is a wasteful number, since it uses less digits than its factorization.

2531327721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11533.

The product of its digits is 17640, while the sum is 33.

The square root of 2531327721 is about 50312.3018853242. The cubic root of 2531327721 is about 1362.8543929682.

The spelling of 2531327721 in words is "two billion, five hundred thirty-one million, three hundred twenty-seven thousand, seven hundred twenty-one".