881531 has 4 divisors (see below), whose sum is σ = 1007472. Its totient is φ = 755592.

The previous prime is 881527. The next prime is 881533. The reversal of 881531 is 135188.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 881531 - 2² = 881527 is a prime.

It is a super-2 number, since 2×881531² = 1554193807922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 881531.

It is not an unprimeable number, because it can be changed into a prime (881533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62960 + ... + 62973.

It is an arithmetic number, because the mean of its divisors is an integer number (251868).

2⁸⁸¹⁵³¹ is an apocalyptic number.

881531 is a deficient number, since it is larger than the sum of its proper divisors (125941).

881531 is a wasteful number, since it uses less digits than its factorization.

881531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125940.

The product of its digits is 960, while the sum is 26.

The square root of 881531 is about 938.8988230901. The cubic root of 881531 is about 95.8839381547.

The spelling of 881531 in words is "eight hundred eighty-one thousand, five hundred thirty-one".