15440197 has 4 divisors (see below), whose sum is σ = 15495040. Its totient is φ = 15385356.

The previous prime is 15440189. The next prime is 15440213. The reversal of 15440197 is 79104451.

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 a cyclic number.

It is not a de Polignac number, because 15440197 - 2³ = 15440189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15440167) 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, 26997 + ... + 27562.

It is an arithmetic number, because the mean of its divisors is an integer number (3873760).

Almost surely, 2^15440197 is an apocalyptic number.

It is an amenable number.

15440197 is a deficient number, since it is larger than the sum of its proper divisors (54843).

15440197 is an equidigital number, since it uses as much as digits as its factorization.

15440197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54842.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 15440197 is about 3929.4016083877. The cubic root of 15440197 is about 249.0104725089.

The spelling of 15440197 in words is "fifteen million, four hundred forty thousand, one hundred ninety-seven".