194549993231 has 16 divisors (see below), whose sum is σ = 212984069760. Its totient is φ = 176240846880.

The previous prime is 194549993219. The next prime is 194549993269. The reversal of 194549993231 is 132399945491.

194549993231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 194549993231 - 2¹⁰ = 194549992207 is a prime.

It is a super-2 number, since 2×194549993231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194549933231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23192420 + ... + 23200806.

It is an arithmetic number, because the mean of its divisors is an integer number (13311504360).

Almost surely, 2^194549993231 is an apocalyptic number.

194549993231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

194549993231 is a deficient number, since it is larger than the sum of its proper divisors (18434076529).

194549993231 is a wasteful number, since it uses less digits than its factorization.

194549993231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15574.

The product of its digits is 9447840, while the sum is 59.

The spelling of 194549993231 in words is "one hundred ninety-four billion, five hundred forty-nine million, nine hundred ninety-three thousand, two hundred thirty-one".