22516906 has 4 divisors (see below), whose sum is σ = 33775362. Its totient is φ = 11258452.

The previous prime is 22516889. The next prime is 22516951. The reversal of 22516906 is 60961522.

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., 22174681 + 342225 = 4709^2 + 585^2 .

It is a super-2 number, since 2×22516906² = 1014022111625672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5629225 + ... + 5629228.

Almost surely, 2^22516906 is an apocalyptic number.

22516906 is a deficient number, since it is larger than the sum of its proper divisors (11258456).

22516906 is a wasteful number, since it uses less digits than its factorization.

22516906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11258455.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 22516906 is about 4745.1982045011. The cubic root of 22516906 is about 282.3814983184.

The spelling of 22516906 in words is "twenty-two million, five hundred sixteen thousand, nine hundred six".