2561104031 has 6 divisors (see below), whose sum is σ = 2702993832. Its totient is φ = 2426308740.

The previous prime is 2561103997. The next prime is 2561104061. The reversal of 2561104031 is 1304011652.

It is not a de Polignac number, because 2561104031 - 2¹⁸ = 2560841887 is a prime.

It is a super-2 number, since 2×2561104031² = 13118507715208897922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2561103988 and 2561104006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561104061) 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 5 ways as a sum of consecutive naturals, for example, 3546875 + ... + 3547596.

It is an arithmetic number, because the mean of its divisors is an integer number (450498972).

Almost surely, 2^2561104031 is an apocalyptic number.

2561104031 is a deficient number, since it is larger than the sum of its proper divisors (141889801).

2561104031 is an equidigital number, since it uses as much as digits as its factorization.

2561104031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7094509 (or 7094490 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2561104031 is about 50607.3515509358. The cubic root of 2561104031 is about 1368.1773818342.

Adding to 2561104031 its reverse (1304011652), we get a palindrome (3865115683).

The spelling of 2561104031 in words is "two billion, five hundred sixty-one million, one hundred four thousand, thirty-one".