13022581 has 16 divisors (see below), whose sum is σ = 16107840. Its totient is φ = 10350720.

The previous prime is 13022567. The next prime is 13022587. The reversal of 13022581 is 18522031.

It is a cyclic number.

It is not a de Polignac number, because 13022581 - 2⁹ = 13022069 is a prime.

It is a super-2 number, since 2×13022581² = 339175231803122, 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 (13022587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321 + ... + 5113.

It is an arithmetic number, because the mean of its divisors is an integer number (1006740).

Almost surely, 2^13022581 is an apocalyptic number.

13022581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13022581 is a deficient number, since it is larger than the sum of its proper divisors (3085259).

13022581 is a wasteful number, since it uses less digits than its factorization.

13022581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 13022581 is about 3608.6813381068. The cubic root of 13022581 is about 235.2695323001.

It can be divided in two parts, 1302 and 2581, that added together give a palindrome (3883).

The spelling of 13022581 in words is "thirteen million, twenty-two thousand, five hundred eighty-one".