2531655261 has 12 divisors (see below), whose sum is σ = 3657355260. Its totient is φ = 1687530240.

The previous prime is 2531655223. The next prime is 2531655263. The reversal of 2531655261 is 1625561352.

2531655261 is a `hidden beast` number, since 2 + 531 + 65 + 5 + 2 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1467656100 + 1063999161 = 38310^2 + 32619^2 .

It is not a de Polignac number, because 2531655261 - 2⁶ = 2531655197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531655263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66541 + ... + 97421.

It is an arithmetic number, because the mean of its divisors is an integer number (304779605).

Almost surely, 2^2531655261 is an apocalyptic number.

It is an amenable number.

2531655261 is a deficient number, since it is larger than the sum of its proper divisors (1125699999).

2531655261 is a wasteful number, since it uses less digits than its factorization.

2531655261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39996 (or 39993 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 2531655261 is about 50315.5568487521. The cubic root of 2531655261 is about 1362.9131724080.

The spelling of 2531655261 in words is "two billion, five hundred thirty-one million, six hundred fifty-five thousand, two hundred sixty-one".