2521143431 has 2 divisors, whose sum is σ = 2521143432. Its totient is φ = 2521143430.

The previous prime is 2521143419. The next prime is 2521143437. The reversal of 2521143431 is 1343411252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521143431 is a prime.

It is a super-2 number, since 2×2521143431² = 12712328399348903522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2521143431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521143437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260571715 + 1260571716.

It is an arithmetic number, because the mean of its divisors is an integer number (1260571716).

Almost surely, 2^2521143431 is an apocalyptic number.

2521143431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521143431 is an equidigital number, since it uses as much as digits as its factorization.

2521143431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 2521143431 is about 50210.9891458035. The cubic root of 2521143431 is about 1361.0242124352.

Adding to 2521143431 its reverse (1343411252), we get a palindrome (3864554683).

The spelling of 2521143431 in words is "two billion, five hundred twenty-one million, one hundred forty-three thousand, four hundred thirty-one".