15222122 has 4 divisors (see below), whose sum is σ = 22833186. Its totient is φ = 7611060.

The previous prime is 15222101. The next prime is 15222131. The reversal of 15222122 is 22122251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11978521 + 3243601 = 3461^2 + 1801^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15222122.

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, 3805529 + ... + 3805532.

Almost surely, 2^15222122 is an apocalyptic number.

15222122 is a deficient number, since it is larger than the sum of its proper divisors (7611064).

15222122 is an equidigital number, since it uses as much as digits as its factorization.

15222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611063.

The product of its digits is 160, while the sum is 17.

The square root of 15222122 is about 3901.5537930419. The cubic root of 15222122 is about 247.8325808131.

Adding to 15222122 its reverse (22122251), we get a palindrome (37344373).

The spelling of 15222122 in words is "fifteen million, two hundred twenty-two thousand, one hundred twenty-two".