30555145 has 4 divisors (see below), whose sum is σ = 36666180. Its totient is φ = 24444112.

The previous prime is 30555131. The next prime is 30555167. The reversal of 30555145 is 54155503.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18974736 + 11580409 = 4356^2 + 3403^2 .

It is a cyclic number.

It is not a de Polignac number, because 30555145 - 2¹³ = 30546953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3055510 + ... + 3055519.

It is an arithmetic number, because the mean of its divisors is an integer number (9166545).

Almost surely, 2^30555145 is an apocalyptic number.

It is an amenable number.

30555145 is a deficient number, since it is larger than the sum of its proper divisors (6111035).

30555145 is an equidigital number, since it uses as much as digits as its factorization.

30555145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111034.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 30555145 is about 5527.6708476536. The cubic root of 30555145 is about 312.6281756867.

The spelling of 30555145 in words is "thirty million, five hundred fifty-five thousand, one hundred forty-five".