22372506 has 48 divisors (see below), whose sum is σ = 53018784. Its totient is φ = 6776352.

The previous prime is 22372501. The next prime is 22372547. The reversal of 22372506 is 60527322.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22372506.

It is not an unprimeable number, because it can be changed into a prime (22372501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14965 + ... + 16391.

It is an arithmetic number, because the mean of its divisors is an integer number (1104558).

Almost surely, 2^22372506 is an apocalyptic number.

22372506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22372506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26509392).

22372506 is an abundant number, since it is smaller than the sum of its proper divisors (30646278).

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

22372506 is a wasteful number, since it uses less digits than its factorization.

22372506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1512 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 22372506 is about 4729.9583507680. The cubic root of 22372506 is about 281.7765696640.

Adding to 22372506 its reverse (60527322), we get a palindrome (82899828).

The spelling of 22372506 in words is "twenty-two million, three hundred seventy-two thousand, five hundred six".