881209131 has 48 divisors (see below), whose sum is σ = 1362046464. Its totient is φ = 502200000.

The previous prime is 881209123. The next prime is 881209139. The reversal of 881209131 is 131902188.

881209131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (881209123) and next prime (881209139).

It is not a de Polignac number, because 881209131 - 2³ = 881209123 is a prime.

It is a super-2 number, since 2×881209131² = 1553059065115550322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 881209092 and 881209101.

It is not an unprimeable number, because it can be changed into a prime (881209139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1173006 + ... + 1173756.

It is an arithmetic number, because the mean of its divisors is an integer number (28375968).

Almost surely, 2^881209131 is an apocalyptic number.

881209131 is a deficient number, since it is larger than the sum of its proper divisors (480837333).

881209131 is a wasteful number, since it uses less digits than its factorization.

881209131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 881209131 is about 29685.1668514765. The cubic root of 881209131 is about 958.7226686005.

It can be divided in two parts, 881 and 209131, that added together give a palindrome (210012).

The spelling of 881209131 in words is "eight hundred eighty-one million, two hundred nine thousand, one hundred thirty-one".