15514891 has 4 divisors (see below), whose sum is σ = 17731312. Its totient is φ = 13298472.

The previous prime is 15514879. The next prime is 15514901. The reversal of 15514891 is 19841551.

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

It is a cyclic number.

It is not a de Polignac number, because 15514891 - 2⁹ = 15514379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15514861) 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, 1108200 + ... + 1108213.

It is an arithmetic number, because the mean of its divisors is an integer number (4432828).

Almost surely, 2^15514891 is an apocalyptic number.

15514891 is a deficient number, since it is larger than the sum of its proper divisors (2216421).

15514891 is an equidigital number, since it uses as much as digits as its factorization.

15514891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216420.

The product of its digits is 7200, while the sum is 34.

The square root of 15514891 is about 3938.8946419015. The cubic root of 15514891 is about 249.4113671332.

The spelling of 15514891 in words is "fifteen million, five hundred fourteen thousand, eight hundred ninety-one".