2431431021 has 32 divisors (see below), whose sum is σ = 3440880000. Its totient is φ = 1524793088.

The previous prime is 2431431017. The next prime is 2431431031. The reversal of 2431431021 is 1201341342.

2431431021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2431431021 - 2² = 2431431017 is a prime.

It is a super-2 number, since 2×2431431021² = 11823713619762204882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2431431011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 685270 + ... + 688808.

It is an arithmetic number, because the mean of its divisors is an integer number (107527500).

Almost surely, 2^2431431021 is an apocalyptic number.

It is an amenable number.

2431431021 is a deficient number, since it is larger than the sum of its proper divisors (1009448979).

2431431021 is a wasteful number, since it uses less digits than its factorization.

2431431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2431431021 is about 49309.5428999296. The cubic root of 2431431021 is about 1344.6852809980.

Adding to 2431431021 its reverse (1201341342), we get a palindrome (3632772363).

The spelling of 2431431021 in words is "two billion, four hundred thirty-one million, four hundred thirty-one thousand, twenty-one".