2505215261 has 2 divisors, whose sum is σ = 2505215262. Its totient is φ = 2505215260.

The previous prime is 2505215243. The next prime is 2505215267. The reversal of 2505215261 is 1625125052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1797336025 + 707879236 = 42395^2 + 26606^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505215261 - 2¹⁰ = 2505214237 is a prime.

It is a super-2 number, since 2×2505215261² = 12552207007894596242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2505215267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252607630 + 1252607631.

It is an arithmetic number, because the mean of its divisors is an integer number (1252607631).

Almost surely, 2^2505215261 is an apocalyptic number.

It is an amenable number.

2505215261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505215261 is an equidigital number, since it uses as much as digits as its factorization.

2505215261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 2505215261 is about 50052.1254393857. The cubic root of 2505215261 is about 1358.1519125521.

The spelling of 2505215261 in words is "two billion, five hundred five million, two hundred fifteen thousand, two hundred sixty-one".