22142857 has 8 divisors (see below), whose sum is σ = 25576992. Its totient is φ = 18945600.

The previous prime is 22142849. The next prime is 22142867. The reversal of 22142857 is 75824122.

It is a happy number.

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 22142857 - 2³ = 22142849 is a prime.

It is a super-2 number, since 2×22142857² = 980612232244898, which contains 22 as substring.

It is a Duffinian number.

22142857 is a modest number, since divided by 142857 gives 22 as remainder.

It is not an unprimeable number, because it can be changed into a prime (22142867) 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, 59019 + ... + 59392.

It is an arithmetic number, because the mean of its divisors is an integer number (3197124).

Almost surely, 2^22142857 is an apocalyptic number.

It is an amenable number.

22142857 is a deficient number, since it is larger than the sum of its proper divisors (3434135).

22142857 is a wasteful number, since it uses less digits than its factorization.

22142857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118439.

The product of its digits is 8960, while the sum is 31.

The square root of 22142857 is about 4705.6197253922. The cubic root of 22142857 is about 280.8091264218.

Adding to 22142857 its reverse (75824122), we get a palindrome (97966979).

The spelling of 22142857 in words is "twenty-two million, one hundred forty-two thousand, eight hundred fifty-seven".