2108731261 has 16 divisors (see below), whose sum is σ = 2600083584. Its totient is φ = 1665411264.

The previous prime is 2108731253. The next prime is 2108731271. The reversal of 2108731261 is 1621378012.

It is a cyclic number.

It is not a de Polignac number, because 2108731261 - 2³ = 2108731253 is a prime.

It is a super-2 number, since 2×2108731261² = 8893495062237300242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108731271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29886 + ... + 71488.

It is an arithmetic number, because the mean of its divisors is an integer number (162505224).

Almost surely, 2^2108731261 is an apocalyptic number.

It is an amenable number.

2108731261 is a deficient number, since it is larger than the sum of its proper divisors (491352323).

2108731261 is a wasteful number, since it uses less digits than its factorization.

2108731261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42180.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2108731261 is about 45920.9239998500. The cubic root of 2108731261 is about 1282.3514841316.

The spelling of 2108731261 in words is "two billion, one hundred eight million, seven hundred thirty-one thousand, two hundred sixty-one".