14315981 has 4 divisors (see below), whose sum is σ = 14331612. Its totient is φ = 14300352.

The previous prime is 14315971. The next prime is 14315993. The reversal of 14315981 is 18951341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18951341 = 19 ⋅997439.

It can be written as a sum of positive squares in 2 ways, for example, as 12602500 + 1713481 = 3550^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 14315981 - 2¹⁰ = 14314957 is a prime.

It is a super-2 number, since 2×14315981² = 409894623984722, 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 (14315941) 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, 6350 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (3582903).

Almost surely, 2^14315981 is an apocalyptic number.

It is an amenable number.

14315981 is a deficient number, since it is larger than the sum of its proper divisors (15631).

14315981 is an equidigital number, since it uses as much as digits as its factorization.

14315981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15630.

The product of its digits is 4320, while the sum is 32.

The square root of 14315981 is about 3783.6465215451. The cubic root of 14315981 is about 242.8139894160.

The spelling of 14315981 in words is "fourteen million, three hundred fifteen thousand, nine hundred eighty-one".