30161901 has 48 divisors (see below), whose sum is σ = 53319168. Its totient is φ = 14968800.

The previous prime is 30161881. The next prime is 30161941. The reversal of 30161901 is 10916103.

It is a happy number.

It is not a de Polignac number, because 30161901 - 2⁵ = 30161869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30161941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36786 + ... + 37596.

It is an arithmetic number, because the mean of its divisors is an integer number (1110816).

Almost surely, 2^30161901 is an apocalyptic number.

It is an amenable number.

30161901 is a deficient number, since it is larger than the sum of its proper divisors (23157267).

30161901 is a wasteful number, since it uses less digits than its factorization.

30161901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 30161901 is about 5491.9851602130. The cubic root of 30161901 is about 311.2812081415.

The spelling of 30161901 in words is "thirty million, one hundred sixty-one thousand, nine hundred one".