2605561231 has 48 divisors (see below), whose sum is σ = 3449658240. Its totient is φ = 1947456000.

The previous prime is 2605561229. The next prime is 2605561243. The reversal of 2605561231 is 1321655062.

It is not a de Polignac number, because 2605561231 - 2¹ = 2605561229 is a prime.

It is a super-2 number, since 2×2605561231² = 13577898656980470722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2605561193 and 2605561202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605561271) 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 47 ways as a sum of consecutive naturals, for example, 866731 + ... + 869731.

It is an arithmetic number, because the mean of its divisors is an integer number (71867880).

Almost surely, 2^2605561231 is an apocalyptic number.

2605561231 is a deficient number, since it is larger than the sum of its proper divisors (844097009).

2605561231 is a wasteful number, since it uses less digits than its factorization.

2605561231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104 (or 3097 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2605561231 is about 51044.6983632972. The cubic root of 2605561231 is about 1376.0485632127.

The spelling of 2605561231 in words is "two billion, six hundred five million, five hundred sixty-one thousand, two hundred thirty-one".