14219851997 has 16 divisors (see below), whose sum is σ = 16127133120. Its totient is φ = 12429417600.

The previous prime is 14219851973. The next prime is 14219852027. The reversal of 14219851997 is 79915891241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 14219851997 - 2¹⁴ = 14219835613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14219851957) 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, 573497 + ... + 597777.

It is an arithmetic number, because the mean of its divisors is an integer number (1007945820).

Almost surely, 2^14219851997 is an apocalyptic number.

It is an amenable number.

14219851997 is a deficient number, since it is larger than the sum of its proper divisors (1907281123).

14219851997 is a wasteful number, since it uses less digits than its factorization.

14219851997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26684.

The product of its digits is 1632960, while the sum is 56.

The spelling of 14219851997 in words is "fourteen billion, two hundred nineteen million, eight hundred fifty-one thousand, nine hundred ninety-seven".