15222143 has 2 divisors, whose sum is σ = 15222144. Its totient is φ = 15222142.

The previous prime is 15222139. The next prime is 15222197. The reversal of 15222143 is 34122251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15222143 - 2² = 15222139 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15222943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7611071 + 7611072.

It is an arithmetic number, because the mean of its divisors is an integer number (7611072).

Almost surely, 2^15222143 is an apocalyptic number.

15222143 is a deficient number, since it is larger than the sum of its proper divisors (1).

15222143 is an equidigital number, since it uses as much as digits as its factorization.

15222143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 20.

The square root of 15222143 is about 3901.5564842765. The cubic root of 15222143 is about 247.8326947806.

Adding to 15222143 its reverse (34122251), we get a palindrome (49344394).

The spelling of 15222143 in words is "fifteen million, two hundred twenty-two thousand, one hundred forty-three".