2531991141 has 12 divisors (see below), whose sum is σ = 3756167532. Its totient is φ = 1642372416.

The previous prime is 2531991127. The next prime is 2531991149. The reversal of 2531991141 is 1411991352.

2531991141 is a `hidden beast` number, since 2 + 531 + 9 + 9 + 114 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1144130625 + 1387860516 = 33825^2 + 37254^2 .

It is not a de Polignac number, because 2531991141 - 2¹⁰ = 2531990117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2531991096 and 2531991105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531991149) 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, 3801456 + ... + 3802121.

It is an arithmetic number, because the mean of its divisors is an integer number (313013961).

Almost surely, 2^2531991141 is an apocalyptic number.

It is an amenable number.

2531991141 is a deficient number, since it is larger than the sum of its proper divisors (1224176391).

2531991141 is a wasteful number, since it uses less digits than its factorization.

2531991141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603620 (or 7603617 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 2531991141 is about 50318.8944731499. The cubic root of 2531991141 is about 1362.9734432566.

The spelling of 2531991141 in words is "two billion, five hundred thirty-one million, nine hundred ninety-one thousand, one hundred forty-one".