14991431 has 16 divisors (see below), whose sum is σ = 18590208. Its totient is φ = 11772000.

The previous prime is 14991419. The next prime is 14991439. The reversal of 14991431 is 13419941.

It is a cyclic number.

It is not a de Polignac number, because 14991431 - 2⁶ = 14991367 is a prime.

It is a super-2 number, since 2×14991431² = 449486006855522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14991439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13196 + ... + 14286.

It is an arithmetic number, because the mean of its divisors is an integer number (1161888).

Almost surely, 2^14991431 is an apocalyptic number.

14991431 is a deficient number, since it is larger than the sum of its proper divisors (3598777).

14991431 is a wasteful number, since it uses less digits than its factorization.

14991431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262.

The product of its digits is 3888, while the sum is 32.

The square root of 14991431 is about 3871.8769350278. The cubic root of 14991431 is about 246.5742363292.

The spelling of 14991431 in words is "fourteen million, nine hundred ninety-one thousand, four hundred thirty-one".