2441156581 has 2 divisors, whose sum is σ = 2441156582. Its totient is φ = 2441156580.

The previous prime is 2441156579. The next prime is 2441156647. The reversal of 2441156581 is 1856511442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1457330625 + 983825956 = 38175^2 + 31366^2 .

It is a cyclic number.

It is not a de Polignac number, because 2441156581 - 2¹ = 2441156579 is a prime.

It is a super-2 number, since 2×2441156581² = 11918490905919219122, which contains 22 as substring.

Together with 2441156579, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2441156581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2441156551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220578290 + 1220578291.

It is an arithmetic number, because the mean of its divisors is an integer number (1220578291).

Almost surely, 2^2441156581 is an apocalyptic number.

It is an amenable number.

2441156581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2441156581 is an equidigital number, since it uses as much as digits as its factorization.

2441156581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 37.

The square root of 2441156581 is about 49408.0619028919. The cubic root of 2441156581 is about 1346.4757792845.

The spelling of 2441156581 in words is "two billion, four hundred forty-one million, one hundred fifty-six thousand, five hundred eighty-one".