22142501 has 4 divisors (see below), whose sum is σ = 22682604. Its totient is φ = 21602400.

The previous prime is 22142459. The next prime is 22142507. The reversal of 22142501 is 10524122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1221025 + 20921476 = 1105^2 + 4574^2 .

It is a cyclic number.

It is not a de Polignac number, because 22142501 - 2²² = 17948197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22142501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22142507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269990 + ... + 270071.

It is an arithmetic number, because the mean of its divisors is an integer number (5670651).

Almost surely, 2^22142501 is an apocalyptic number.

It is an amenable number.

22142501 is a deficient number, since it is larger than the sum of its proper divisors (540103).

22142501 is an equidigital number, since it uses as much as digits as its factorization.

22142501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540102.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 22142501 is about 4705.5818981291. The cubic root of 22142501 is about 280.8076215183.

Adding to 22142501 its reverse (10524122), we get a palindrome (32666623).

The spelling of 22142501 in words is "twenty-two million, one hundred forty-two thousand, five hundred one".