15480865 has 4 divisors (see below), whose sum is σ = 18577044. Its totient is φ = 12384688.

The previous prime is 15480853. The next prime is 15480869. The reversal of 15480865 is 56808451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4669921 + 10810944 = 2161^2 + 3288^2 .

It is a cyclic number.

It is not a de Polignac number, because 15480865 - 2⁷ = 15480737 is a prime.

It is a super-2 number, since 2×15480865² = 479314362296450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15480869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1548082 + ... + 1548091.

It is an arithmetic number, because the mean of its divisors is an integer number (4644261).

Almost surely, 2^15480865 is an apocalyptic number.

It is an amenable number.

15480865 is a deficient number, since it is larger than the sum of its proper divisors (3096179).

15480865 is an equidigital number, since it uses as much as digits as its factorization.

15480865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096178.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 15480865 is about 3934.5730390984. The cubic root of 15480865 is about 249.2289040896.

The spelling of 15480865 in words is "fifteen million, four hundred eighty thousand, eight hundred sixty-five".