2531399287 has 2 divisors, whose sum is σ = 2531399288. Its totient is φ = 2531399286.

The previous prime is 2531399267. The next prime is 2531399383. The reversal of 2531399287 is 7829931352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2531399287 - 2²⁷ = 2397181559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2531399287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2531399267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265699643 + 1265699644.

It is an arithmetic number, because the mean of its divisors is an integer number (1265699644).

Almost surely, 2^2531399287 is an apocalyptic number.

2531399287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531399287 is an equidigital number, since it uses as much as digits as its factorization.

2531399287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The square root of 2531399287 is about 50313.0130980048. The cubic root of 2531399287 is about 1362.8672364413.

The spelling of 2531399287 in words is "two billion, five hundred thirty-one million, three hundred ninety-nine thousand, two hundred eighty-seven".