30256155 has 72 divisors (see below), whose sum is σ = 57972096. Its totient is φ = 14572800.

The previous prime is 30256123. The next prime is 30256157. The reversal of 30256155 is 55165203.

It is not a de Polignac number, because 30256155 - 2⁵ = 30256123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30256157) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 737935 + ... + 737975.

It is an arithmetic number, because the mean of its divisors is an integer number (805168).

Almost surely, 2^30256155 is an apocalyptic number.

30256155 is a deficient number, since it is larger than the sum of its proper divisors (27715941).

30256155 is a wasteful number, since it uses less digits than its factorization.

30256155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 30256155 is about 5500.5595169946. The cubic root of 30256155 is about 311.6051155614.

It can be divided in two parts, 3025 and 6155, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 30256155 in words is "thirty million, two hundred fifty-six thousand, one hundred fifty-five".