242515213 has 2 divisors, whose sum is σ = 242515214. Its totient is φ = 242515212.

The previous prime is 242515187. The next prime is 242515237. The reversal of 242515213 is 312515242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175880644 + 66634569 = 13262^2 + 8163^2 .

It is a cyclic number.

It is not a de Polignac number, because 242515213 - 2⁵ = 242515181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242515283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121257606 + 121257607.

It is an arithmetic number, because the mean of its divisors is an integer number (121257607).

Almost surely, 2^242515213 is an apocalyptic number.

It is an amenable number.

242515213 is a deficient number, since it is larger than the sum of its proper divisors (1).

242515213 is an equidigital number, since it uses as much as digits as its factorization.

242515213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 242515213 is about 15572.8999547290. The cubic root of 242515213 is about 623.6098922128.

The spelling of 242515213 in words is "two hundred forty-two million, five hundred fifteen thousand, two hundred thirteen".