15575641 has 2 divisors, whose sum is σ = 15575642. Its totient is φ = 15575640.

The previous prime is 15575633. The next prime is 15575647. The reversal of 15575641 is 14657551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7958041 + 7617600 = 2821^2 + 2760^2 .

It is a cyclic number.

It is not a de Polignac number, because 15575641 - 2³ = 15575633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15575597 and 15575606.

It is not a weakly prime, because it can be changed into another prime (15575647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7787820 + 7787821.

It is an arithmetic number, because the mean of its divisors is an integer number (7787821).

Almost surely, 2^15575641 is an apocalyptic number.

It is an amenable number.

15575641 is a deficient number, since it is larger than the sum of its proper divisors (1).

15575641 is an equidigital number, since it uses as much as digits as its factorization.

15575641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 34.

The square root of 15575641 is about 3946.5986621393. The cubic root of 15575641 is about 249.7364743145.

The spelling of 15575641 in words is "fifteen million, five hundred seventy-five thousand, six hundred forty-one".