22381407 has 8 divisors (see below), whose sum is σ = 33157680. Its totient is φ = 14920920.

The previous prime is 22381397. The next prime is 22381427. The reversal of 22381407 is 70418322.

It is not a de Polignac number, because 22381407 - 2⁶ = 22381343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 828941 = 22381407 / (2 + 2 + 3 + 8 + 1 + 4 + 0 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22381427) 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, 414444 + ... + 414497.

It is an arithmetic number, because the mean of its divisors is an integer number (4144710).

Almost surely, 2^22381407 is an apocalyptic number.

22381407 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

22381407 is a deficient number, since it is larger than the sum of its proper divisors (10776273).

22381407 is an equidigital number, since it uses as much as digits as its factorization.

22381407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828950 (or 828944 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 22381407 is about 4730.8991745756. The cubic root of 22381407 is about 281.8139333923.

Adding to 22381407 its reverse (70418322), we get a palindrome (92799729).

The spelling of 22381407 in words is "twenty-two million, three hundred eighty-one thousand, four hundred seven".