30972241 has 4 divisors (see below), whose sum is σ = 31256500. Its totient is φ = 30687984.

The previous prime is 30972233. The next prime is 30972257. The reversal of 30972241 is 14227903.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26306641 + 4665600 = 5129^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 30972241 - 2³ = 30972233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30972211) 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, 141966 + ... + 142183.

It is an arithmetic number, because the mean of its divisors is an integer number (7814125).

Almost surely, 2^30972241 is an apocalyptic number.

It is an amenable number.

30972241 is a deficient number, since it is larger than the sum of its proper divisors (284259).

30972241 is a wasteful number, since it uses less digits than its factorization.

30972241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284258.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 30972241 is about 5565.2709727380. The cubic root of 30972241 is about 314.0442720921.

It can be divided in two parts, 30972 and 241, that added together give a palindrome (31213).

The spelling of 30972241 in words is "thirty million, nine hundred seventy-two thousand, two hundred forty-one".