30680155 has 48 divisors (see below), whose sum is σ = 45390240. Its totient is φ = 19768320.

The previous prime is 30680147. The next prime is 30680159. The reversal of 30680155 is 55108603.

It is not a de Polignac number, because 30680155 - 2³ = 30680147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30680159) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195337 + ... + 195493.

It is an arithmetic number, because the mean of its divisors is an integer number (945630).

Almost surely, 2^30680155 is an apocalyptic number.

30680155 is a deficient number, since it is larger than the sum of its proper divisors (14710085).

30680155 is a wasteful number, since it uses less digits than its factorization.

30680155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 30680155 is about 5538.9669614469. The cubic root of 30680155 is about 313.0539465448.

Adding to 30680155 its reverse (55108603), we get a palindrome (85788758).

The spelling of 30680155 in words is "thirty million, six hundred eighty thousand, one hundred fifty-five".