30012155 has 4 divisors (see below), whose sum is σ = 36014592. Its totient is φ = 24009720.

The previous prime is 30012149. The next prime is 30012163. The reversal of 30012155 is 55121003.

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

It is not a de Polignac number, because 30012155 - 2⁴ = 30012139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001211 + ... + 3001220.

It is an arithmetic number, because the mean of its divisors is an integer number (9003648).

Almost surely, 2^30012155 is an apocalyptic number.

30012155 is a deficient number, since it is larger than the sum of its proper divisors (6002437).

30012155 is an equidigital number, since it uses as much as digits as its factorization.

30012155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002436.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 30012155 is about 5478.3350572961. The cubic root of 30012155 is about 310.7652098303.

Adding to 30012155 its reverse (55121003), we get a palindrome (85133158).

The spelling of 30012155 in words is "thirty million, twelve thousand, one hundred fifty-five".