22290381 has 24 divisors (see below), whose sum is σ = 33808320. Its totient is φ = 14125056.

The previous prime is 22290343. The next prime is 22290409. The reversal of 22290381 is 18309222.

It is a happy number.

It is not a de Polignac number, because 22290381 - 2¹⁴ = 22273997 is a prime.

It is a super-2 number, since 2×22290381² = 993722170250322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22290341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52990 + ... + 53408.

It is an arithmetic number, because the mean of its divisors is an integer number (1408680).

Almost surely, 2^22290381 is an apocalyptic number.

It is an amenable number.

22290381 is a deficient number, since it is larger than the sum of its proper divisors (11517939).

22290381 is a wasteful number, since it uses less digits than its factorization.

22290381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 22290381 is about 4721.2690031389. The cubic root of 22290381 is about 281.4313650950.

The spelling of 22290381 in words is "twenty-two million, two hundred ninety thousand, three hundred eighty-one".