15623441 has 2 divisors, whose sum is σ = 15623442. Its totient is φ = 15623440.

The previous prime is 15623437. The next prime is 15623477. The reversal of 15623441 is 14432651.

15623441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13987600 + 1635841 = 3740^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 15623441 - 2² = 15623437 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 15623441.

It is not a weakly prime, because it can be changed into another prime (15623401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7811720 + 7811721.

It is an arithmetic number, because the mean of its divisors is an integer number (7811721).

Almost surely, 2^15623441 is an apocalyptic number.

It is an amenable number.

15623441 is a deficient number, since it is larger than the sum of its proper divisors (1).

15623441 is an equidigital number, since it uses as much as digits as its factorization.

15623441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 15623441 is about 3952.6498706564. The cubic root of 15623441 is about 249.9916850568.

The spelling of 15623441 in words is "fifteen million, six hundred twenty-three thousand, four hundred forty-one".