2321131531 has 8 divisors (see below), whose sum is σ = 2350344384. Its totient is φ = 2292071040.

The previous prime is 2321131507. The next prime is 2321131537. The reversal of 2321131531 is 1351311232.

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 2321131531 - 2⁹ = 2321131019 is a prime.

It is a super-2 number, since 2×2321131531² = 10775303168404807922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2321131537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7276 + ... + 68521.

It is an arithmetic number, because the mean of its divisors is an integer number (293793048).

Almost surely, 2^2321131531 is an apocalyptic number.

2321131531 is a deficient number, since it is larger than the sum of its proper divisors (29212853).

2321131531 is a wasteful number, since it uses less digits than its factorization.

2321131531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76181.

The product of its digits is 540, while the sum is 22.

The square root of 2321131531 is about 48178.1229501524. The cubic root of 2321131531 is about 1324.0363765665.

Adding to 2321131531 its reverse (1351311232), we get a palindrome (3672442763).

The spelling of 2321131531 in words is "two billion, three hundred twenty-one million, one hundred thirty-one thousand, five hundred thirty-one".