14515981 has 4 divisors (see below), whose sum is σ = 15280000. Its totient is φ = 13751964.

The previous prime is 14515933. The next prime is 14515993. The reversal of 14515981 is 18951541.

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 14515981 - 2⁹ = 14515469 is a prime.

It is a super-2 number, since 2×14515981² = 421427408784722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14515901) 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, 381981 + ... + 382018.

It is an arithmetic number, because the mean of its divisors is an integer number (3820000).

Almost surely, 2^14515981 is an apocalyptic number.

It is an amenable number.

14515981 is a deficient number, since it is larger than the sum of its proper divisors (764019).

14515981 is an equidigital number, since it uses as much as digits as its factorization.

14515981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764018.

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

The square root of 14515981 is about 3809.9843831701. The cubic root of 14515981 is about 243.9395005877.

The spelling of 14515981 in words is "fourteen million, five hundred fifteen thousand, nine hundred eighty-one".