15224402 has 4 divisors (see below), whose sum is σ = 22836606. Its totient is φ = 7612200.

The previous prime is 15224393. The next prime is 15224411. The reversal of 15224402 is 20442251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20442251 = 1289 ⋅15859.

It is an interprime number because it is at equal distance from previous prime (15224393) and next prime (15224411).

It can be written as a sum of positive squares in only one way, i.e., 15202201 + 22201 = 3899^2 + 149^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3806099 + ... + 3806102.

Almost surely, 2^15224402 is an apocalyptic number.

15224402 is a deficient number, since it is larger than the sum of its proper divisors (7612204).

15224402 is an equidigital number, since it uses as much as digits as its factorization.

15224402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612203.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 15224402 is about 3901.8459733823. The cubic root of 15224402 is about 247.8449538159.

Adding to 15224402 its reverse (20442251), we get a palindrome (35666653).

The spelling of 15224402 in words is "fifteen million, two hundred twenty-four thousand, four hundred two".