22202381 has 4 divisors (see below), whose sum is σ = 22282812. Its totient is φ = 22121952.

The previous prime is 22202359. The next prime is 22202387. The reversal of 22202381 is 18320222.

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 15132100 + 7070281 = 3890^2 + 2659^2 .

It is a cyclic number.

It is not a de Polignac number, because 22202381 - 2¹⁴ = 22185997 is a prime.

It is a super-2 number, since 2×22202381² = 985891444138322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22202387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39800 + ... + 40353.

It is an arithmetic number, because the mean of its divisors is an integer number (5570703).

Almost surely, 2^22202381 is an apocalyptic number.

It is an amenable number.

22202381 is a deficient number, since it is larger than the sum of its proper divisors (80431).

22202381 is an equidigital number, since it uses as much as digits as its factorization.

22202381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80430.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22202381 is about 4711.9402585347. The cubic root of 22202381 is about 281.0605231774.

The spelling of 22202381 in words is "twenty-two million, two hundred two thousand, three hundred eighty-one".