30256161 has 16 divisors (see below), whose sum is σ = 43585920. Its totient is φ = 18558720.

The previous prime is 30256157. The next prime is 30256181. The reversal of 30256161 is 16165203.

It is not a de Polignac number, because 30256161 - 2² = 30256157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30256181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12921 + ... + 15081.

It is an arithmetic number, because the mean of its divisors is an integer number (2724120).

Almost surely, 2^30256161 is an apocalyptic number.

It is an amenable number.

30256161 is a deficient number, since it is larger than the sum of its proper divisors (13329759).

30256161 is a wasteful number, since it uses less digits than its factorization.

30256161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 30256161 is about 5500.5600623936. The cubic root of 30256161 is about 311.6051361592.

The spelling of 30256161 in words is "thirty million, two hundred fifty-six thousand, one hundred sixty-one".