22313172 has 48 divisors (see below), whose sum is σ = 60072320. Its totient is φ = 6314112.

The previous prime is 22313171. The next prime is 22313177. The reversal of 22313172 is 27131322.

It is a super-3 number, since 3×22313172³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22313171) 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, 7938 + ... + 10374.

Almost surely, 2^22313172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22313172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30036160).

22313172 is an abundant number, since it is smaller than the sum of its proper divisors (37759148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22313172 is a wasteful number, since it uses less digits than its factorization.

22313172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560 (or 2558 counting only the distinct ones).

The product of its digits is 504, while the sum is 21.

The square root of 22313172 is about 4723.6820384103. The cubic root of 22313172 is about 281.5272497643.

Adding to 22313172 its reverse (27131322), we get a palindrome (49444494).

The spelling of 22313172 in words is "twenty-two million, three hundred thirteen thousand, one hundred seventy-two".