22281013 has 8 divisors (see below), whose sum is σ = 22563000. Its totient is φ = 22001088.

The previous prime is 22280989. The next prime is 22281023. The reversal of 22281013 is 31018222.

It can be written as a sum of positive squares in 4 ways, for example, as 1868689 + 20412324 = 1367^2 + 4518^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22281013 - 2⁵ = 22280981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22281023) 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, 33795 + ... + 34447.

It is an arithmetic number, because the mean of its divisors is an integer number (2820375).

Almost surely, 2^22281013 is an apocalyptic number.

It is an amenable number.

22281013 is a deficient number, since it is larger than the sum of its proper divisors (281987).

22281013 is a wasteful number, since it uses less digits than its factorization.

22281013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22281013 is about 4720.2767927315. The cubic root of 22281013 is about 281.3919337598.

Adding to 22281013 its reverse (31018222), we get a palindrome (53299235).

The spelling of 22281013 in words is "twenty-two million, two hundred eighty-one thousand, thirteen".