22301681 has 4 divisors (see below), whose sum is σ = 22435392. Its totient is φ = 22167972.

The previous prime is 22301677. The next prime is 22301683. The reversal of 22301681 is 18610322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22301681 - 2² = 22301677 is a prime.

It is a super-2 number, since 2×22301681² = 994729950851522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22301683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66605 + ... + 66938.

It is an arithmetic number, because the mean of its divisors is an integer number (5608848).

Almost surely, 2^22301681 is an apocalyptic number.

It is an amenable number.

22301681 is a deficient number, since it is larger than the sum of its proper divisors (133711).

22301681 is a wasteful number, since it uses less digits than its factorization.

22301681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133710.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 22301681 is about 4722.4655636648. The cubic root of 22301681 is about 281.4789138140.

The spelling of 22301681 in words is "twenty-two million, three hundred one thousand, six hundred eighty-one".