270215261 has 2 divisors, whose sum is σ = 270215262. Its totient is φ = 270215260.

The previous prime is 270215249. The next prime is 270215263. The reversal of 270215261 is 162512072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268763236 + 1452025 = 16394^2 + 1205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-270215261 is a prime.

Together with 270215263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 270215261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (270215263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135107630 + 135107631.

It is an arithmetic number, because the mean of its divisors is an integer number (135107631).

Almost surely, 2^270215261 is an apocalyptic number.

It is an amenable number.

270215261 is a deficient number, since it is larger than the sum of its proper divisors (1).

270215261 is an equidigital number, since it uses as much as digits as its factorization.

270215261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 270215261 is about 16438.2256037566. The cubic root of 270215261 is about 646.5021264809.

The spelling of 270215261 in words is "two hundred seventy million, two hundred fifteen thousand, two hundred sixty-one".