4225961581 has 2 divisors, whose sum is σ = 4225961582. Its totient is φ = 4225961580.

The previous prime is 4225961573. The next prime is 4225961587. The reversal of 4225961581 is 1851695224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3107059081 + 1118902500 = 55741^2 + 33450^2 .

It is a cyclic number.

It is not a de Polignac number, because 4225961581 - 2³ = 4225961573 is a prime.

It is a super-2 number, since 2×4225961581² = 35717502568176039122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4225961587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2112980790 + 2112980791.

It is an arithmetic number, because the mean of its divisors is an integer number (2112980791).

Almost surely, 2^4225961581 is an apocalyptic number.

It is an amenable number.

4225961581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4225961581 is an equidigital number, since it uses as much as digits as its factorization.

4225961581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 43.

The square root of 4225961581 is about 65007.3963561070. The cubic root of 4225961581 is about 1616.7461974172.

The spelling of 4225961581 in words is "four billion, two hundred twenty-five million, nine hundred sixty-one thousand, five hundred eighty-one".