30161031 has 16 divisors (see below), whose sum is σ = 41579904. Its totient is φ = 19432224.

The previous prime is 30161029. The next prime is 30161039. The reversal of 30161031 is 13016103.

It is not a de Polignac number, because 30161031 - 2¹ = 30161029 is a prime.

It is a super-2 number, since 2×30161031² = 1819375581965922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30161031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30161039) 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, 17260 + ... + 18926.

It is an arithmetic number, because the mean of its divisors is an integer number (2598744).

Almost surely, 2^30161031 is an apocalyptic number.

30161031 is a deficient number, since it is larger than the sum of its proper divisors (11418873).

30161031 is a wasteful number, since it uses less digits than its factorization.

30161031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 30161031 is about 5491.9059533098. The cubic root of 30161031 is about 311.2782152129.

Adding to 30161031 its reverse (13016103), we get a palindrome (43177134).

The spelling of 30161031 in words is "thirty million, one hundred sixty-one thousand, thirty-one".