2531620163 has 4 divisors (see below), whose sum is σ = 2618917440. Its totient is φ = 2444322888.

The previous prime is 2531620151. The next prime is 2531620181. The reversal of 2531620163 is 3610261352.

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 2531620163 - 2⁶ = 2531620099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 87297247 = 2531620163 / (2 + 5 + 3 + 1 + 6 + 2 + 0 + 1 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531620103) 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 in 3 ways as a sum of consecutive naturals, for example, 43648595 + ... + 43648652.

It is an arithmetic number, because the mean of its divisors is an integer number (654729360).

Almost surely, 2^2531620163 is an apocalyptic number.

2531620163 is a deficient number, since it is larger than the sum of its proper divisors (87297277).

2531620163 is an equidigital number, since it uses as much as digits as its factorization.

2531620163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87297276.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2531620163 is about 50315.2080687340. The cubic root of 2531620163 is about 1362.9068740587.

The spelling of 2531620163 in words is "two billion, five hundred thirty-one million, six hundred twenty thousand, one hundred sixty-three".