30402131 has 2 divisors, whose sum is σ = 30402132. Its totient is φ = 30402130.

The previous prime is 30402107. The next prime is 30402139. The reversal of 30402131 is 13120403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30402131 - 2²² = 26207827 is a prime.

It is a super-2 number, since 2×30402131² = 1848579138682322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30402139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15201065 + 15201066.

It is an arithmetic number, because the mean of its divisors is an integer number (15201066).

Almost surely, 2^30402131 is an apocalyptic number.

30402131 is a deficient number, since it is larger than the sum of its proper divisors (1).

30402131 is an equidigital number, since it uses as much as digits as its factorization.

30402131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30402131 is about 5513.8127461857. The cubic root of 30402131 is about 312.1054425277.

Adding to 30402131 its reverse (13120403), we get a palindrome (43522534).

The spelling of 30402131 in words is "thirty million, four hundred two thousand, one hundred thirty-one".