30985531 has 8 divisors (see below), whose sum is σ = 32394240. Its totient is φ = 29581992.

The previous prime is 30985519. The next prime is 30985541. The reversal of 30985531 is 13558903.

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

It is a cyclic number.

It is not a de Polignac number, because 30985531 - 2⁷ = 30985403 is a prime.

It is a super-2 number, since 2×30985531² = 1920206262703922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30985541) 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, 16086 + ... + 17908.

It is an arithmetic number, because the mean of its divisors is an integer number (4049280).

Almost surely, 2^30985531 is an apocalyptic number.

30985531 is a deficient number, since it is larger than the sum of its proper divisors (1408709).

30985531 is a wasteful number, since it uses less digits than its factorization.

30985531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 30985531 is about 5566.4648566213. The cubic root of 30985531 is about 314.0891838305.

The spelling of 30985531 in words is "thirty million, nine hundred eighty-five thousand, five hundred thirty-one".