2531343987 has 8 divisors (see below), whose sum is σ = 3750139280. Its totient is φ = 1687562640.

The previous prime is 2531343961. The next prime is 2531344009. The reversal of 2531343987 is 7893431352.

2531343987 is a `hidden beast` number, since 2 + 531 + 3 + 4 + 39 + 87 = 666.

It is not a de Polignac number, because 2531343987 - 2⁶ = 2531343923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531343887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46876714 + ... + 46876767.

It is an arithmetic number, because the mean of its divisors is an integer number (468767410).

Almost surely, 2^2531343987 is an apocalyptic number.

2531343987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2531343987 is a deficient number, since it is larger than the sum of its proper divisors (1218795293).

2531343987 is an equidigital number, since it uses as much as digits as its factorization.

2531343987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93753490 (or 93753484 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 2531343987 is about 50312.4635353905. The cubic root of 2531343987 is about 1362.8573121401.

The spelling of 2531343987 in words is "two billion, five hundred thirty-one million, three hundred forty-three thousand, nine hundred eighty-seven".