30023131 has 4 divisors (see below), whose sum is σ = 30446064. Its totient is φ = 29600200.

The previous prime is 30023107. The next prime is 30023137. The reversal of 30023131 is 13132003.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30023131 is a prime.

It is a super-2 number, since 2×30023131² = 1802776790086322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30023137) 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, 211360 + ... + 211501.

It is an arithmetic number, because the mean of its divisors is an integer number (7611516).

Almost surely, 2^30023131 is an apocalyptic number.

30023131 is a deficient number, since it is larger than the sum of its proper divisors (422933).

30023131 is an equidigital number, since it uses as much as digits as its factorization.

30023131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422932.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30023131 is about 5479.3367299337. The cubic root of 30023131 is about 310.8030894073.

Adding to 30023131 its reverse (13132003), we get a palindrome (43155134).

The spelling of 30023131 in words is "thirty million, twenty-three thousand, one hundred thirty-one".