22012238 has 4 divisors (see below), whose sum is σ = 33018360. Its totient is φ = 11006118.

The previous prime is 22012231. The next prime is 22012261. The reversal of 22012238 is 83221022.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5503058 + ... + 5503061.

It is an arithmetic number, because the mean of its divisors is an integer number (8254590).

Almost surely, 2^22012238 is an apocalyptic number.

22012238 is a deficient number, since it is larger than the sum of its proper divisors (11006122).

22012238 is a wasteful number, since it uses less digits than its factorization.

22012238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006121.

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

The square root of 22012238 is about 4691.7201536324. The cubic root of 22012238 is about 280.2558800365.

It can be divided in two parts, 220 and 12238, that multiplied together give a triangular number (2692360 = T₂₃₂₀).

The spelling of 22012238 in words is "twenty-two million, twelve thousand, two hundred thirty-eight".