22051550 has 24 divisors (see below), whose sum is σ = 43430256. Its totient is φ = 8301440.

The previous prime is 22051543. The next prime is 22051573. The reversal of 22051550 is 5515022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12122 + ... + 13821.

It is an arithmetic number, because the mean of its divisors is an integer number (1809594).

Almost surely, 2^22051550 is an apocalyptic number.

22051550 is a deficient number, since it is larger than the sum of its proper divisors (21378706).

22051550 is a wasteful number, since it uses less digits than its factorization.

22051550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25972 (or 25967 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 22051550 is about 4695.9077929619. The cubic root of 22051550 is about 280.4226186015.

Adding to 22051550 its reverse (5515022), we get a palindrome (27566572).

The spelling of 22051550 in words is "twenty-two million, fifty-one thousand, five hundred fifty".