2252665781 has 2 divisors, whose sum is σ = 2252665782. Its totient is φ = 2252665780.

The previous prime is 2252665771. The next prime is 2252665853. The reversal of 2252665781 is 1875662522.

2252665781 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., 2211820900 + 40844881 = 47030^2 + 6391^2 .

It is a cyclic number.

It is not a de Polignac number, because 2252665781 - 2¹⁴ = 2252649397 is a prime.

It is a super-2 number, since 2×2252665781² = 10149006241776679922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2252665771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1126332890 + 1126332891.

It is an arithmetic number, because the mean of its divisors is an integer number (1126332891).

Almost surely, 2^2252665781 is an apocalyptic number.

It is an amenable number.

2252665781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2252665781 is an equidigital number, since it uses as much as digits as its factorization.

2252665781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 44.

The square root of 2252665781 is about 47462.2563833621. The cubic root of 2252665781 is about 1310.8879982391.

The spelling of 2252665781 in words is "two billion, two hundred fifty-two million, six hundred sixty-five thousand, seven hundred eighty-one".