2431931081 has 2 divisors, whose sum is σ = 2431931082. Its totient is φ = 2431931080.

The previous prime is 2431931071. The next prime is 2431931083. The reversal of 2431931081 is 1801391342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1759047481 + 672883600 = 41941^2 + 25940^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431931081 - 2¹⁰ = 2431930057 is a prime.

It is a super-2 number, since 2×2431931081² = 11828577565467657122, which contains 22 as substring.

Together with 2431931083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2431931083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215965540 + 1215965541.

It is an arithmetic number, because the mean of its divisors is an integer number (1215965541).

Almost surely, 2^2431931081 is an apocalyptic number.

It is an amenable number.

2431931081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431931081 is an equidigital number, since it uses as much as digits as its factorization.

2431931081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2431931081 is about 49314.6132601686. The cubic root of 2431931081 is about 1344.7774595303. Note that the first 3 decimals are identical.

The spelling of 2431931081 in words is "two billion, four hundred thirty-one million, nine hundred thirty-one thousand, eighty-one".