22391401 has 4 divisors (see below), whose sum is σ = 22996612. Its totient is φ = 21786192.

The previous prime is 22391399. The next prime is 22391407. The reversal of 22391401 is 10419322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 1010025 = 4624^2 + 1005^2 .

It is not a de Polignac number, because 22391401 - 2¹ = 22391399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22391407) 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, 302550 + ... + 302623.

It is an arithmetic number, because the mean of its divisors is an integer number (5749153).

Almost surely, 2^22391401 is an apocalyptic number.

It is an amenable number.

22391401 is a deficient number, since it is larger than the sum of its proper divisors (605211).

22391401 is an equidigital number, since it uses as much as digits as its factorization.

22391401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605210.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 22391401 is about 4731.9553041000. The cubic root of 22391401 is about 281.8558734029.

The spelling of 22391401 in words is "twenty-two million, three hundred ninety-one thousand, four hundred one".