22219725 has 48 divisors (see below), whose sum is σ = 41854464. Its totient is φ = 10296000.

The previous prime is 22219723. The next prime is 22219751. The reversal of 22219725 is 52791222.

It is not a de Polignac number, because 22219725 - 2¹ = 22219723 is a prime.

It is a super-3 number, since 3×22219725³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22219692 and 22219701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22219723) 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 47 ways as a sum of consecutive naturals, for example, 18390 + ... + 19560.

It is an arithmetic number, because the mean of its divisors is an integer number (871968).

Almost surely, 2^22219725 is an apocalyptic number.

22219725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22219725 is a deficient number, since it is larger than the sum of its proper divisors (19634739).

22219725 is a wasteful number, since it uses less digits than its factorization.

22219725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1213 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 22219725 is about 4713.7803300536. The cubic root of 22219725 is about 281.1336901788.

It can be divided in two parts, 222197 and 25, that added together give a palindrome (222222).

The spelling of 22219725 in words is "twenty-two million, two hundred nineteen thousand, seven hundred twenty-five".