30123131 has 4 divisors (see below), whose sum is σ = 30399600. Its totient is φ = 29846664.

The previous prime is 30123109. The next prime is 30123139. The reversal of 30123131 is 13132103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13132103 = 23 ⋅570961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30123131 is a prime.

It is a super-2 number, since 2×30123131² = 1814806042486322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30123139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138071 + ... + 138288.

It is an arithmetic number, because the mean of its divisors is an integer number (7599900).

Almost surely, 2^30123131 is an apocalyptic number.

30123131 is a deficient number, since it is larger than the sum of its proper divisors (276469).

30123131 is a wasteful number, since it uses less digits than its factorization.

30123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276468.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 30123131 is about 5488.4543361497. The cubic root of 30123131 is about 311.1477777032.

Adding to 30123131 its reverse (13132103), we get a palindrome (43255234).

It can be divided in two parts, 301 and 23131, that added together give a palindrome (23432).

The spelling of 30123131 in words is "thirty million, one hundred twenty-three thousand, one hundred thirty-one".