22151663 has 8 divisors (see below), whose sum is σ = 24689520. Its totient is φ = 19751040.

The previous prime is 22151653. The next prime is 22151669. The reversal of 22151663 is 36615122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22151663 - 2²⁰ = 21103087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33968 + ... + 34613.

It is an arithmetic number, because the mean of its divisors is an integer number (3086190).

Almost surely, 2^22151663 is an apocalyptic number.

22151663 is a deficient number, since it is larger than the sum of its proper divisors (2537857).

22151663 is a wasteful number, since it uses less digits than its factorization.

22151663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68617.

The product of its digits is 2160, while the sum is 26.

The square root of 22151663 is about 4706.5553221013. Note that the first 3 decimals coincide. The cubic root of 22151663 is about 280.8463465124.

Adding to 22151663 its reverse (36615122), we get a palindrome (58766785).

The spelling of 22151663 in words is "twenty-two million, one hundred fifty-one thousand, six hundred sixty-three".