199755929731 has 4 divisors (see below), whose sum is σ = 199765030312. Its totient is φ = 199746829152.

The previous prime is 199755929713. The next prime is 199755929743. The reversal of 199755929731 is 137929557991.

It is a happy number.

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 199755929731 - 2⁵ = 199755929699 is a prime.

It is a super-2 number, since 2×199755929731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199755929231) 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, 4517286 + ... + 4561291.

It is an arithmetic number, because the mean of its divisors is an integer number (49941257578).

Almost surely, 2^199755929731 is an apocalyptic number.

199755929731 is a deficient number, since it is larger than the sum of its proper divisors (9100581).

199755929731 is an equidigital number, since it uses as much as digits as its factorization.

199755929731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100580.

The product of its digits is 48223350, while the sum is 67.

The spelling of 199755929731 in words is "one hundred ninety-nine billion, seven hundred fifty-five million, nine hundred twenty-nine thousand, seven hundred thirty-one".