2505155321 has 2 divisors, whose sum is σ = 2505155322. Its totient is φ = 2505155320.

The previous prime is 2505155311. The next prime is 2505155351. The reversal of 2505155321 is 1235515052.

2505155321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1852097296 + 653058025 = 43036^2 + 25555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505155321 is a prime.

It is a super-2 number, since 2×2505155321² = 12551606364669226082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2505155311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252577660 + 1252577661.

It is an arithmetic number, because the mean of its divisors is an integer number (1252577661).

Almost surely, 2^2505155321 is an apocalyptic number.

It is an amenable number.

2505155321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505155321 is an equidigital number, since it uses as much as digits as its factorization.

2505155321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 2505155321 is about 50051.5266600331. The cubic root of 2505155321 is about 1358.1410807118.

The spelling of 2505155321 in words is "two billion, five hundred five million, one hundred fifty-five thousand, three hundred twenty-one".