30944181 has 4 divisors (see below), whose sum is σ = 41258912. Its totient is φ = 20629452.

The previous prime is 30944161. The next prime is 30944191. The reversal of 30944181 is 18144903.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30944181 - 2⁶ = 30944117 is a prime.

It is a super-2 number, since 2×30944181² = 1915084675521522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30944161) 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, 5157361 + ... + 5157366.

It is an arithmetic number, because the mean of its divisors is an integer number (10314728).

Almost surely, 2^30944181 is an apocalyptic number.

It is an amenable number.

30944181 is a deficient number, since it is larger than the sum of its proper divisors (10314731).

30944181 is a wasteful number, since it uses less digits than its factorization.

30944181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314730.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 30944181 is about 5562.7494101388. The cubic root of 30944181 is about 313.9494049412.

It can be divided in two parts, 30944 and 181, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 30944181 in words is "thirty million, nine hundred forty-four thousand, one hundred eighty-one".