15505797 has 16 divisors (see below), whose sum is σ = 21514752. Its totient is φ = 9922560.

The previous prime is 15505793. The next prime is 15505829. The reversal of 15505797 is 79750551.

15505797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15505797 - 2² = 15505793 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15505793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12133 + ... + 13349.

It is an arithmetic number, because the mean of its divisors is an integer number (1344672).

Almost surely, 2^15505797 is an apocalyptic number.

It is an amenable number.

15505797 is a deficient number, since it is larger than the sum of its proper divisors (6008955).

15505797 is a wasteful number, since it uses less digits than its factorization.

15505797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388.

The product of its (nonzero) digits is 55125, while the sum is 39.

The square root of 15505797 is about 3937.7400879184. The cubic root of 15505797 is about 249.3626270706.

The spelling of 15505797 in words is "fifteen million, five hundred five thousand, seven hundred ninety-seven".