22150555 has 16 divisors (see below), whose sum is σ = 30953664. Its totient is φ = 14901120.

The previous prime is 22150553. The next prime is 22150567. The reversal of 22150555 is 55505122.

It is a happy number.

It is not a de Polignac number, because 22150555 - 2¹ = 22150553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22150553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4116 + ... + 7825.

It is an arithmetic number, because the mean of its divisors is an integer number (1934604).

Almost surely, 2^22150555 is an apocalyptic number.

22150555 is a deficient number, since it is larger than the sum of its proper divisors (8803109).

22150555 is a wasteful number, since it uses less digits than its factorization.

22150555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12006.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 22150555 is about 4706.4376124623. The cubic root of 22150555 is about 280.8416639003.

Adding to 22150555 its reverse (55505122), we get a palindrome (77655677).

The spelling of 22150555 in words is "twenty-two million, one hundred fifty thousand, five hundred fifty-five".