22155506 has 16 divisors (see below), whose sum is σ = 33853248. Its totient is φ = 10873200.

The previous prime is 22155491. The next prime is 22155547. The reversal of 22155506 is 60555122.

It is a super-2 number, since 2×22155506² = 981732892232072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26576 + ... + 27396.

It is an arithmetic number, because the mean of its divisors is an integer number (2115828).

Almost surely, 2^22155506 is an apocalyptic number.

22155506 is a deficient number, since it is larger than the sum of its proper divisors (11697742).

22155506 is a wasteful number, since it uses less digits than its factorization.

22155506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 22155506 is about 4706.9635647623. The cubic root of 22155506 is about 280.8625865287.

The spelling of 22155506 in words is "twenty-two million, one hundred fifty-five thousand, five hundred six".