30157261 has 2 divisors, whose sum is σ = 30157262. Its totient is φ = 30157260.

The previous prime is 30157247. The next prime is 30157273. The reversal of 30157261 is 16275103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 17161 = 5490^2 + 131^2 .

It is a cyclic number.

It is not a de Polignac number, because 30157261 - 2⁵ = 30157229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30157291) 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, 15078630 + 15078631.

It is an arithmetic number, because the mean of its divisors is an integer number (15078631).

Almost surely, 2^30157261 is an apocalyptic number.

It is an amenable number.

30157261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30157261 is an equidigital number, since it uses as much as digits as its factorization.

30157261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 30157261 is about 5491.5627101946. The cubic root of 30157261 is about 311.2652451902.

The spelling of 30157261 in words is "thirty million, one hundred fifty-seven thousand, two hundred sixty-one".