15505713 has 6 divisors (see below), whose sum is σ = 22397154. Its totient is φ = 10337136.

The previous prime is 15505697. The next prime is 15505739. The reversal of 15505713 is 31750551.

15505713 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12723489 + 2782224 = 3567^2 + 1668^2 .

It is not a de Polignac number, because 15505713 - 2⁴ = 15505697 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (15505753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 861420 + ... + 861437.

It is an arithmetic number, because the mean of its divisors is an integer number (3732859).

Almost surely, 2^15505713 is an apocalyptic number.

It is an amenable number.

15505713 is a deficient number, since it is larger than the sum of its proper divisors (6891441).

15505713 is a wasteful number, since it uses less digits than its factorization.

15505713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722863 (or 1722860 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 27.

The square root of 15505713 is about 3937.7294218877. The cubic root of 15505713 is about 249.3621767767.

The spelling of 15505713 in words is "fifteen million, five hundred five thousand, seven hundred thirteen".