22154650 has 24 divisors (see below), whose sum is σ = 47095200. Its totient is φ = 7595760.

The previous prime is 22154647. The next prime is 22154659. The reversal of 22154650 is 5645122.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (22154659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31300 + ... + 31999.

It is an arithmetic number, because the mean of its divisors is an integer number (1962300).

Almost surely, 2^22154650 is an apocalyptic number.

22154650 is an abundant number, since it is smaller than the sum of its proper divisors (24940550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22154650 is a wasteful number, since it uses less digits than its factorization.

22154650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63318 (or 63313 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 22154650 is about 4706.8726347757. The cubic root of 22154650 is about 280.8589693470.

Adding to 22154650 its reverse (5645122), we get a palindrome (27799772).

The spelling of 22154650 in words is "twenty-two million, one hundred fifty-four thousand, six hundred fifty".