2622239581 has 8 divisors (see below), whose sum is σ = 2826145784. Its totient is φ = 2418647040.

The previous prime is 2622239569. The next prime is 2622239593. The reversal of 2622239581 is 1859322262.

2622239581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 20906-th star number.

It is an interprime number because it is at equal distance from previous prime (2622239569) and next prime (2622239593).

It can be written as a sum of positive squares in 4 ways, for example, as 680427225 + 1941812356 = 26085^2 + 44066^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 10-Lehmer number, since φ(2622239581) divides (2622239581-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 2622239581 - 2⁵ = 2622239549 is a prime.

It is a super-2 number, since 2×2622239581² = 13752280840326111122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2622230581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60900 + ... + 94621.

It is an arithmetic number, because the mean of its divisors is an integer number (353268223).

Almost surely, 2^2622239581 is an apocalyptic number.

It is an amenable number.

2622239581 is a deficient number, since it is larger than the sum of its proper divisors (203906203).

2622239581 is a wasteful number, since it uses less digits than its factorization.

2622239581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156831.

The product of its digits is 103680, while the sum is 40.

The square root of 2622239581 is about 51207.8078128717. The cubic root of 2622239581 is about 1378.9783765821.

The spelling of 2622239581 in words is "two billion, six hundred twenty-two million, two hundred thirty-nine thousand, five hundred eighty-one".