30002131 has 4 divisors (see below), whose sum is σ = 30449992. Its totient is φ = 29554272.

The previous prime is 30002123. The next prime is 30002207. The reversal of 30002131 is 13120003.

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

It is a cyclic number.

It is not a de Polignac number, because 30002131 - 2³ = 30002123 is a prime.

It is a super-2 number, since 2×30002131² = 1800255729082322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30002111) 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, 223830 + ... + 223963.

It is an arithmetic number, because the mean of its divisors is an integer number (7612498).

Almost surely, 2^30002131 is an apocalyptic number.

30002131 is a deficient number, since it is larger than the sum of its proper divisors (447861).

30002131 is an equidigital number, since it uses as much as digits as its factorization.

30002131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447860.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 30002131 is about 5477.4201043922. The cubic root of 30002131 is about 310.7306076573.

Adding to 30002131 its reverse (13120003), we get a palindrome (43122134).

The spelling of 30002131 in words is "thirty million, two thousand, one hundred thirty-one".