30155745 has 16 divisors (see below), whose sum is σ = 48678912. Its totient is φ = 15939840.

The previous prime is 30155729. The next prime is 30155753. The reversal of 30155745 is 54755103.

It is not a de Polignac number, because 30155745 - 2⁴ = 30155729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7201 + ... + 10590.

It is an arithmetic number, because the mean of its divisors is an integer number (3042432).

Almost surely, 2^30155745 is an apocalyptic number.

It is an amenable number.

30155745 is a deficient number, since it is larger than the sum of its proper divisors (18523167).

30155745 is a wasteful number, since it uses less digits than its factorization.

30155745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17912.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 30155745 is about 5491.4246785329. The cubic root of 30155745 is about 311.2600293538.

The spelling of 30155745 in words is "thirty million, one hundred fifty-five thousand, seven hundred forty-five".