2506231861 has 6 divisors (see below), whose sum is σ = 2915412630. Its totient is φ = 2148198696.

The previous prime is 2506231837. The next prime is 2506231867. The reversal of 2506231861 is 1681326052.

It can be written as a sum of positive squares in only one way, i.e., 2048015025 + 458216836 = 45255^2 + 21406^2 .

It is not a de Polignac number, because 2506231861 - 2¹³ = 2506223669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506231867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25573746 + ... + 25573843.

It is an arithmetic number, because the mean of its divisors is an integer number (485902105).

Almost surely, 2^2506231861 is an apocalyptic number.

It is an amenable number.

2506231861 is a deficient number, since it is larger than the sum of its proper divisors (409180769).

2506231861 is an equidigital number, since it uses as much as digits as its factorization.

2506231861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51147603 (or 51147596 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2506231861 is about 50062.2798222374. The cubic root of 2506231861 is about 1358.3355974352.

The spelling of 2506231861 in words is "two billion, five hundred six million, two hundred thirty-one thousand, eight hundred sixty-one".