2531629887 has 4 divisors (see below), whose sum is σ = 3375506520. Its totient is φ = 1687753256.

The previous prime is 2531629871. The next prime is 2531629909. The reversal of 2531629887 is 7889261352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2531629887 - 2⁴ = 2531629871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531629187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421938312 + ... + 421938317.

It is an arithmetic number, because the mean of its divisors is an integer number (843876630).

Almost surely, 2^2531629887 is an apocalyptic number.

2531629887 is a deficient number, since it is larger than the sum of its proper divisors (843876633).

2531629887 is an equidigital number, since it uses as much as digits as its factorization.

2531629887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843876632.

The product of its digits is 1451520, while the sum is 51.

The square root of 2531629887 is about 50315.3046994650. The cubic root of 2531629887 is about 1362.9086190399.

The spelling of 2531629887 in words is "two billion, five hundred thirty-one million, six hundred twenty-nine thousand, eight hundred eighty-seven".