30916161 has 14 divisors (see below), whose sum is σ = 46354130. Its totient is φ = 20610288.

The previous prime is 30916153. The next prime is 30916181. The reversal of 30916161 is 16161903.

It can be written as a sum of positive squares in only one way, i.e., 28291761 + 2624400 = 5319^2 + 1620^2 .

It is not a de Polignac number, because 30916161 - 2³ = 30916153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30916111) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 20476 + ... + 21933.

Almost surely, 2^30916161 is an apocalyptic number.

It is an amenable number.

30916161 is a deficient number, since it is larger than the sum of its proper divisors (15437969).

30916161 is an frugal number, since it uses more digits than its factorization.

30916161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42427 (or 42412 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 30916161 is about 5560.2303009857. The cubic root of 30916161 is about 313.8546157803.

The spelling of 30916161 in words is "thirty million, nine hundred sixteen thousand, one hundred sixty-one".