2431159897 has 2 divisors, whose sum is σ = 2431159898. Its totient is φ = 2431159896.

The previous prime is 2431159891. The next prime is 2431159909. The reversal of 2431159897 is 7989511342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2418278976 + 12880921 = 49176^2 + 3589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431159897 - 2⁷ = 2431159769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2431159897.

It is not a weakly prime, because it can be changed into another prime (2431159891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215579948 + 1215579949.

It is an arithmetic number, because the mean of its divisors is an integer number (1215579949).

Almost surely, 2^2431159897 is an apocalyptic number.

It is an amenable number.

2431159897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431159897 is an equidigital number, since it uses as much as digits as its factorization.

2431159897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 2431159897 is about 49306.7936191353. The cubic root of 2431159897 is about 1344.6352980866.

The spelling of 2431159897 in words is "two billion, four hundred thirty-one million, one hundred fifty-nine thousand, eight hundred ninety-seven".