2531221131 has 8 divisors (see below), whose sum is σ = 3404828880. Its totient is φ = 1672547072.

The previous prime is 2531221129. The next prime is 2531221157. The reversal of 2531221131 is 1311221352.

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 2531221131 - 2¹ = 2531221129 is a prime.

It is a super-2 number, since 2×2531221131² = 12814160828041838322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2531221098 and 2531221107.

It is not an unprimeable number, because it can be changed into a prime (2531221031) 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, 3733026 + ... + 3733703.

It is an arithmetic number, because the mean of its divisors is an integer number (425603610).

Almost surely, 2^2531221131 is an apocalyptic number.

2531221131 is a deficient number, since it is larger than the sum of its proper divisors (873607749).

2531221131 is a wasteful number, since it uses less digits than its factorization.

2531221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7466845.

The product of its digits is 360, while the sum is 21.

The square root of 2531221131 is about 50311.2425904986. The cubic root of 2531221131 is about 1362.8352635225.

Adding to 2531221131 its reverse (1311221352), we get a palindrome (3842442483).

It can be divided in two parts, 2531221 and 131, that added together give a palindrome (2531352).

The spelling of 2531221131 in words is "two billion, five hundred thirty-one million, two hundred twenty-one thousand, one hundred thirty-one".