15500449 has 2 divisors, whose sum is σ = 15500450. Its totient is φ = 15500448.

The previous prime is 15500423. The next prime is 15500467. The reversal of 15500449 is 94400551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8020224 + 7480225 = 2832^2 + 2735^2 .

It is a cyclic number.

It is not a de Polignac number, because 15500449 - 2¹¹ = 15498401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15500479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750224 + 7750225.

It is an arithmetic number, because the mean of its divisors is an integer number (7750225).

Almost surely, 2^15500449 is an apocalyptic number.

It is an amenable number.

15500449 is a deficient number, since it is larger than the sum of its proper divisors (1).

15500449 is an equidigital number, since it uses as much as digits as its factorization.

15500449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 15500449 is about 3937.0609596500. The cubic root of 15500449 is about 249.3339551127. Note that the first 3 decimals are identical.

The spelling of 15500449 in words is "fifteen million, five hundred thousand, four hundred forty-nine".