15222132 has 36 divisors (see below), whose sum is σ = 39058656. Its totient is φ = 4997520.

The previous prime is 15222131. The next prime is 15222139. The reversal of 15222132 is 23122251.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15222131) 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 11 ways as a sum of consecutive naturals, for example, 744 + ... + 5567.

Almost surely, 2^15222132 is an apocalyptic number.

15222132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15222132 is an abundant number, since it is smaller than the sum of its proper divisors (23836524).

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

15222132 is a wasteful number, since it uses less digits than its factorization.

15222132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6388 (or 6383 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 15222132 is about 3901.5550745824. Note that the first 3 decimals coincide. The cubic root of 15222132 is about 247.8326350833.

Adding to 15222132 its reverse (23122251), we get a palindrome (38344383).

The spelling of 15222132 in words is "fifteen million, two hundred twenty-two thousand, one hundred thirty-two".