16131222 has 24 divisors (see below), whose sum is σ = 36079680. Its totient is φ = 5203440.

The previous prime is 16131217. The next prime is 16131229. The reversal of 16131222 is 22213161.

16131222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×16131222³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 16131195 and 16131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16131229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13897 + ... + 15012.

It is an arithmetic number, because the mean of its divisors is an integer number (1503320).

Almost surely, 2^16131222 is an apocalyptic number.

16131222 is an abundant number, since it is smaller than the sum of its proper divisors (19948458).

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

16131222 is a wasteful number, since it uses less digits than its factorization.

16131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28948 (or 28945 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 16131222 is about 4016.3692559325. The cubic root of 16131222 is about 252.6712076129.

Adding to 16131222 its reverse (22213161), we get a palindrome (38344383).

The spelling of 16131222 in words is "sixteen million, one hundred thirty-one thousand, two hundred twenty-two".