30155225 has 6 divisors (see below), whose sum is σ = 37392510. Its totient is φ = 24124160.

The previous prime is 30155221. The next prime is 30155227. The reversal of 30155225 is 52255103.

It can be written as a sum of positive squares in 3 ways, for example, as 2917264 + 27237961 = 1708^2 + 5219^2 .

It is not a de Polignac number, because 30155225 - 2² = 30155221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30155225.

It is not an unprimeable number, because it can be changed into a prime (30155221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 603080 + ... + 603129.

It is an arithmetic number, because the mean of its divisors is an integer number (6232085).

Almost surely, 2^30155225 is an apocalyptic number.

It is an amenable number.

30155225 is a deficient number, since it is larger than the sum of its proper divisors (7237285).

30155225 is a wasteful number, since it uses less digits than its factorization.

30155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206219 (or 1206214 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 30155225 is about 5491.3773317812. The cubic root of 30155225 is about 311.2582402403.

The spelling of 30155225 in words is "thirty million, one hundred fifty-five thousand, two hundred twenty-five".