30040155 has 12 divisors (see below), whose sum is σ = 52069680. Its totient is φ = 16021392.

The previous prime is 30040151. The next prime is 30040169. The reversal of 30040155 is 55104003.

It is not a de Polignac number, because 30040155 - 2² = 30040151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30040151) 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, 333735 + ... + 333824.

It is an arithmetic number, because the mean of its divisors is an integer number (4339140).

Almost surely, 2^30040155 is an apocalyptic number.

30040155 is a deficient number, since it is larger than the sum of its proper divisors (22029525).

30040155 is a wasteful number, since it uses less digits than its factorization.

30040155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667570 (or 667567 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 30040155 is about 5480.8899824755. The cubic root of 30040155 is about 310.8618231443.

Adding to 30040155 its reverse (55104003), we get a palindrome (85144158).

The spelling of 30040155 in words is "thirty million, forty thousand, one hundred fifty-five".