30981100 has 18 divisors (see below), whose sum is σ = 67229204. Its totient is φ = 12392400.

The previous prime is 30981073. The next prime is 30981103. The reversal of 30981100 is 118903.

It is not an unprimeable number, because it can be changed into a prime (30981103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154806 + ... + 155005.

Almost surely, 2^30981100 is an apocalyptic number.

It is an amenable number.

30981100 is an abundant number, since it is smaller than the sum of its proper divisors (36248104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30981100 is a wasteful number, since it uses less digits than its factorization.

30981100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309825 (or 309818 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 30981100 is about 5566.0668339502. The cubic root of 30981100 is about 314.0742112990.

The spelling of 30981100 in words is "thirty million, nine hundred eighty-one thousand, one hundred".