15481971 has 6 divisors (see below), whose sum is σ = 22362860. Its totient is φ = 10321308.

The previous prime is 15481933. The next prime is 15481981. The reversal of 15481971 is 17918451.

It is not a de Polignac number, because 15481971 - 2¹⁰ = 15480947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15481901) 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, 860101 + ... + 860118.

Almost surely, 2^15481971 is an apocalyptic number.

15481971 is a deficient number, since it is larger than the sum of its proper divisors (6880889).

15481971 is a wasteful number, since it uses less digits than its factorization.

15481971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720225 (or 1720222 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 15481971 is about 3934.7135855104. The cubic root of 15481971 is about 249.2348391715.

The spelling of 15481971 in words is "fifteen million, four hundred eighty-one thousand, nine hundred seventy-one".