22228157 has 16 divisors (see below), whose sum is σ = 27469440. Its totient is φ = 17558208.

The previous prime is 22228139. The next prime is 22228169. The reversal of 22228157 is 75182222.

22228157 = T₂₇₈ + T₂₇₉ + ... + T₅₃₆.

It is a cyclic number.

It is not a de Polignac number, because 22228157 - 2⁶ = 22228093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22228127) 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, 2663 + ... + 7179.

It is an arithmetic number, because the mean of its divisors is an integer number (1716840).

Almost surely, 2^22228157 is an apocalyptic number.

It is an amenable number.

22228157 is a deficient number, since it is larger than the sum of its proper divisors (5241283).

22228157 is a wasteful number, since it uses less digits than its factorization.

22228157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580.

The product of its digits is 4480, while the sum is 29.

The square root of 22228157 is about 4714.6746441298. The cubic root of 22228157 is about 281.1692474667.

The spelling of 22228157 in words is "twenty-two million, two hundred twenty-eight thousand, one hundred fifty-seven".