15222402 has 24 divisors (see below), whose sum is σ = 35519484. Its totient is φ = 4683744.

The previous prime is 15222391. The next prime is 15222409. The reversal of 15222402 is 20422251.

It can be written as a sum of positive squares in 2 ways, for example, as 11840481 + 3381921 = 3441^2 + 1839^2 .

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

It is not an unprimeable number, because it can be changed into a prime (15222409) 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, 32293 + ... + 32760.

Almost surely, 2^15222402 is an apocalyptic number.

15222402 is an abundant number, since it is smaller than the sum of its proper divisors (20297082).

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

15222402 is a wasteful number, since it uses less digits than its factorization.

15222402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65074 (or 65071 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 15222402 is about 3901.5896760167. The cubic root of 15222402 is about 247.8341003712.

Adding to 15222402 its reverse (20422251), we get a palindrome (35644653).

The spelling of 15222402 in words is "fifteen million, two hundred twenty-two thousand, four hundred two".