22272157 has 8 divisors (see below), whose sum is σ = 22635936. Its totient is φ = 21911472.

The previous prime is 22272149. The next prime is 22272169. The reversal of 22272157 is 75127222.

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 22272157 - 2³ = 22272149 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 (22272127) 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, 16803 + ... + 18079.

It is an arithmetic number, because the mean of its divisors is an integer number (2829492).

Almost surely, 2^22272157 is an apocalyptic number.

It is an amenable number.

22272157 is a deficient number, since it is larger than the sum of its proper divisors (363779).

22272157 is a wasteful number, since it uses less digits than its factorization.

22272157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547.

The product of its digits is 3920, while the sum is 28.

The square root of 22272157 is about 4719.3386189168. The cubic root of 22272157 is about 281.3546473461.

Adding to 22272157 its reverse (75127222), we get a palindrome (97399379).

It can be divided in two parts, 2227215 and 7, that added together give a palindrome (2227222).

The spelling of 22272157 in words is "twenty-two million, two hundred seventy-two thousand, one hundred fifty-seven".