15481497 has 4 divisors (see below), whose sum is σ = 20642000. Its totient is φ = 10320996.

The previous prime is 15481483. The next prime is 15481513. The reversal of 15481497 is 79418451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 15481497 - 2⁴ = 15481481 is a prime.

It is a super-2 number, since 2×15481497² = 479353498722018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15481897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2580247 + ... + 2580252.

It is an arithmetic number, because the mean of its divisors is an integer number (5160500).

Almost surely, 2^15481497 is an apocalyptic number.

It is an amenable number.

15481497 is a deficient number, since it is larger than the sum of its proper divisors (5160503).

15481497 is an equidigital number, since it uses as much as digits as its factorization.

15481497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160502.

The product of its digits is 40320, while the sum is 39.

The square root of 15481497 is about 3934.6533519486. The cubic root of 15481497 is about 249.2322955996.

The spelling of 15481497 in words is "fifteen million, four hundred eighty-one thousand, four hundred ninety-seven".