30157213 has 2 divisors, whose sum is σ = 30157214. Its totient is φ = 30157212.

The previous prime is 30157207. The next prime is 30157217. The reversal of 30157213 is 31275103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21874329 + 8282884 = 4677^2 + 2878^2 .

It is an emirp because it is prime and its reverse (31275103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30157213 - 2⁹ = 30156701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30157217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15078606 + 15078607.

It is an arithmetic number, because the mean of its divisors is an integer number (15078607).

Almost surely, 2^30157213 is an apocalyptic number.

It is an amenable number.

30157213 is a deficient number, since it is larger than the sum of its proper divisors (1).

30157213 is an equidigital number, since it uses as much as digits as its factorization.

30157213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 30157213 is about 5491.5583398522. The cubic root of 30157213 is about 311.2650800476.

The spelling of 30157213 in words is "thirty million, one hundred fifty-seven thousand, two hundred thirteen".