981942531 has 8 divisors (see below), whose sum is σ = 1321493184. Its totient is φ = 648510120.

The previous prime is 981942529. The next prime is 981942547. The reversal of 981942531 is 135249189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 981942531 - 2¹ = 981942529 is a prime.

It is a super-2 number, since 2×981942531² = 1928422268373371922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (981949531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1529185 + ... + 1529826.

It is an arithmetic number, because the mean of its divisors is an integer number (165186648).

Almost surely, 2^981942531 is an apocalyptic number.

981942531 is a deficient number, since it is larger than the sum of its proper divisors (339550653).

981942531 is a wasteful number, since it uses less digits than its factorization.

981942531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059121.

The product of its digits is 77760, while the sum is 42.

The square root of 981942531 is about 31335.9622638272. The cubic root of 981942531 is about 993.9442455303.

The spelling of 981942531 in words is "nine hundred eighty-one million, nine hundred forty-two thousand, five hundred thirty-one".