30853971 has 12 divisors (see below), whose sum is σ = 46504848. Its totient is φ = 19674864.

The previous prime is 30853957. The next prime is 30853987. The reversal of 30853971 is 17935803.

It is not a de Polignac number, because 30853971 - 2⁵ = 30853939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30853931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74320 + ... + 74733.

It is an arithmetic number, because the mean of its divisors is an integer number (3875404).

Almost surely, 2^30853971 is an apocalyptic number.

30853971 is a deficient number, since it is larger than the sum of its proper divisors (15650877).

30853971 is a wasteful number, since it uses less digits than its factorization.

30853971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149082 (or 149079 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 30853971 is about 5554.6350915249. The cubic root of 30853971 is about 313.6440277442.

It can be divided in two parts, 3085 and 3971, that added together give a square (7056 = 84²).

The spelling of 30853971 in words is "thirty million, eight hundred fifty-three thousand, nine hundred seventy-one".