13722237 has 32 divisors (see below), whose sum is σ = 22348800. Its totient is φ = 8282736.

The previous prime is 13722229. The next prime is 13722239. The reversal of 13722237 is 73222731.

It is a happy number.

It is not a de Polignac number, because 13722237 - 2³ = 13722229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13722237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13722239) 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 31 ways as a sum of consecutive naturals, for example, 11218 + ... + 12380.

It is an arithmetic number, because the mean of its divisors is an integer number (698400).

Almost surely, 2^13722237 is an apocalyptic number.

It is an amenable number.

13722237 is a deficient number, since it is larger than the sum of its proper divisors (8626563).

13722237 is a wasteful number, since it uses less digits than its factorization.

13722237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1208 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 13722237 is about 3704.3537897992. The cubic root of 13722237 is about 239.4096427671.

Adding to 13722237 its reverse (73222731), we get a palindrome (86944968).

The spelling of 13722237 in words is "thirteen million, seven hundred twenty-two thousand, two hundred thirty-seven".