194995998031 has 4 divisors (see below), whose sum is σ = 195299258392. Its totient is φ = 194692737672.

The previous prime is 194995998023. The next prime is 194995998047. The reversal of 194995998031 is 130899599491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 194995998031 - 2³ = 194995998023 is a prime.

It is a super-2 number, since 2×194995998031² (a number of 23 digits) 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 (194995998931) 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, 151629216 + ... + 151630501.

It is an arithmetic number, because the mean of its divisors is an integer number (48824814598).

Almost surely, 2^194995998031 is an apocalyptic number.

194995998031 is a deficient number, since it is larger than the sum of its proper divisors (303260361).

194995998031 is an equidigital number, since it uses as much as digits as its factorization.

194995998031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303260360.

The product of its (nonzero) digits is 28343520, while the sum is 67.

The spelling of 194995998031 in words is "one hundred ninety-four billion, nine hundred ninety-five million, nine hundred ninety-eight thousand, thirty-one".