15228869 has 2 divisors, whose sum is σ = 15228870. Its totient is φ = 15228868.

The previous prime is 15228827. The next prime is 15228877. The reversal of 15228869 is 96882251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8008900 + 7219969 = 2830^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 15228869 - 2¹⁶ = 15163333 is a prime.

It is a super-2 number, since 2×15228869² = 463836902038322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15258869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7614434 + 7614435.

It is an arithmetic number, because the mean of its divisors is an integer number (7614435).

Almost surely, 2^15228869 is an apocalyptic number.

It is an amenable number.

15228869 is a deficient number, since it is larger than the sum of its proper divisors (1).

15228869 is an equidigital number, since it uses as much as digits as its factorization.

15228869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 15228869 is about 3902.4183527654. The cubic root of 15228869 is about 247.8691915527.

The spelling of 15228869 in words is "fifteen million, two hundred twenty-eight thousand, eight hundred sixty-nine".