252240332261 has 2 divisors, whose sum is σ = 252240332262. Its totient is φ = 252240332260.

The previous prime is 252240332237. The next prime is 252240332269. The reversal of 252240332261 is 162233042252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223719540100 + 28520792161 = 472990^2 + 168881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252240332261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252240332269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126120166130 + 126120166131.

It is an arithmetic number, because the mean of its divisors is an integer number (126120166131).

Almost surely, 2^252240332261 is an apocalyptic number.

It is an amenable number.

252240332261 is a deficient number, since it is larger than the sum of its proper divisors (1).

252240332261 is an equidigital number, since it uses as much as digits as its factorization.

252240332261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 252240332261 in words is "two hundred fifty-two billion, two hundred forty million, three hundred thirty-two thousand, two hundred sixty-one".