22331906 has 4 divisors (see below), whose sum is σ = 33497862. Its totient is φ = 11165952.

The previous prime is 22331899. The next prime is 22331923. The reversal of 22331906 is 60913322.

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

It can be written as a sum of positive squares in only one way, i.e., 19882681 + 2449225 = 4459^2 + 1565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5582975 + ... + 5582978.

Almost surely, 2^22331906 is an apocalyptic number.

22331906 is a deficient number, since it is larger than the sum of its proper divisors (11165956).

22331906 is a wasteful number, since it uses less digits than its factorization.

22331906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11165955.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 22331906 is about 4725.6646093433. The cubic root of 22331906 is about 281.6060172316.

The spelling of 22331906 in words is "twenty-two million, three hundred thirty-one thousand, nine hundred six".