15541541 has 2 divisors, whose sum is σ = 15541542. Its totient is φ = 15541540.

The previous prime is 15541529. The next prime is 15541549. The reversal of 15541541 is 14514551.

15541541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 3500641 = 3470^2 + 1871^2 .

It is a cyclic number.

It is not a de Polignac number, because 15541541 - 2¹⁴ = 15525157 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15541541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15541549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7770770 + 7770771.

It is an arithmetic number, because the mean of its divisors is an integer number (7770771).

Almost surely, 2^15541541 is an apocalyptic number.

It is an amenable number.

15541541 is a deficient number, since it is larger than the sum of its proper divisors (1).

15541541 is an equidigital number, since it uses as much as digits as its factorization.

15541541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000, while the sum is 26.

The square root of 15541541 is about 3942.2761191981. The cubic root of 15541541 is about 249.5540904649.

The spelling of 15541541 in words is "fifteen million, five hundred forty-one thousand, five hundred forty-one".