30112155 has 40 divisors (see below), whose sum is σ = 54450000. Its totient is φ = 15920064.

The previous prime is 30112139. The next prime is 30112157. The reversal of 30112155 is 55121103.

It is not a de Polignac number, because 30112155 - 2⁴ = 30112139 is a prime.

It is a super-4 number, since 4×30112155⁴ (a number of 31 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (30112157) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 60096 + ... + 60594.

It is an arithmetic number, because the mean of its divisors is an integer number (1361250).

Almost surely, 2^30112155 is an apocalyptic number.

30112155 is a deficient number, since it is larger than the sum of its proper divisors (24337845).

30112155 is a wasteful number, since it uses less digits than its factorization.

30112155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 30112155 is about 5487.4543278282. The cubic root of 30112155 is about 311.1099820207.

Adding to 30112155 its reverse (55121103), we get a palindrome (85233258).

The spelling of 30112155 in words is "thirty million, one hundred twelve thousand, one hundred fifty-five".