30387131 has 2 divisors, whose sum is σ = 30387132. Its totient is φ = 30387130.

The previous prime is 30387121. The next prime is 30387139. The reversal of 30387131 is 13178303.

It is a strong prime.

It is an emirp because it is prime and its reverse (13178303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30387131 - 2²² = 26192827 is a prime.

It is a super-2 number, since 2×30387131² = 1846755460822322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1880450 and since 30387131 and 1880450 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30387131.

It is not a weakly prime, because it can be changed into another prime (30387139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15193565 + 15193566.

It is an arithmetic number, because the mean of its divisors is an integer number (15193566).

Almost surely, 2^30387131 is an apocalyptic number.

30387131 is a deficient number, since it is larger than the sum of its proper divisors (1).

30387131 is an equidigital number, since it uses as much as digits as its factorization.

30387131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 30387131 is about 5512.4523580708. The cubic root of 30387131 is about 312.0541045498.

The spelling of 30387131 in words is "thirty million, three hundred eighty-seven thousand, one hundred thirty-one".