2563939831 has 4 divisors (see below), whose sum is σ = 2576954952. Its totient is φ = 2550924712.

The previous prime is 2563939823. The next prime is 2563939841. The reversal of 2563939831 is 1389393652.

It is a happy number.

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 2563939831 - 2³ = 2563939823 is a prime.

It is a super-2 number, since 2×2563939831² = 13147574913976617122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563939841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6507265 + ... + 6507658.

It is an arithmetic number, because the mean of its divisors is an integer number (644238738).

Almost surely, 2^2563939831 is an apocalyptic number.

2563939831 is a deficient number, since it is larger than the sum of its proper divisors (13015121).

2563939831 is a wasteful number, since it uses less digits than its factorization.

2563939831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13015120.

The product of its digits is 1049760, while the sum is 49.

The square root of 2563939831 is about 50635.3614680492. The cubic root of 2563939831 is about 1368.6821701658.

The spelling of 2563939831 in words is "two billion, five hundred sixty-three million, nine hundred thirty-nine thousand, eight hundred thirty-one".