22107381 has 4 divisors (see below), whose sum is σ = 29476512. Its totient is φ = 14738252.

The previous prime is 22107311. The next prime is 22107383. The reversal of 22107381 is 18370122.

Added to its reverse (18370122) it gives a triangular number (40477503 = T₈₉₉₇).

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 22107381 - 2⁹ = 22106869 is a prime.

It is a super-2 number, since 2×22107381² = 977472589358322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22107383) 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, 3684561 + ... + 3684566.

It is an arithmetic number, because the mean of its divisors is an integer number (7369128).

Almost surely, 2^22107381 is an apocalyptic number.

It is an amenable number.

22107381 is a deficient number, since it is larger than the sum of its proper divisors (7369131).

22107381 is an equidigital number, since it uses as much as digits as its factorization.

22107381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7369130.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 22107381 is about 4701.8486789772. The cubic root of 22107381 is about 280.6590809017.

Adding to 22107381 its reverse (18370122), we get a triangular number (40477503 = T₈₉₉₇).

It can be divided in two parts, 2210 and 7381, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 22107381 in words is "twenty-two million, one hundred seven thousand, three hundred eighty-one".