229195943991 has 24 divisors (see below), whose sum is σ = 379113488000. Its totient is φ = 130706629776.

The previous prime is 229195943987. The next prime is 229195944007. The reversal of 229195943991 is 199349591922.

229195943991 is a `hidden beast` number, since 2 + 2 + 9 + 1 + 9 + 594 + 39 + 9 + 1 = 666.

It is not a de Polignac number, because 229195943991 - 2² = 229195943987 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229195943981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3613885 + ... + 3676758.

Almost surely, 2^229195943991 is an apocalyptic number.

229195943991 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

229195943991 is a deficient number, since it is larger than the sum of its proper divisors (149917544009).

229195943991 is a wasteful number, since it uses less digits than its factorization.

229195943991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291155 (or 7291152 counting only the distinct ones).

The product of its digits is 14171760, while the sum is 63.

The spelling of 229195943991 in words is "two hundred twenty-nine billion, one hundred ninety-five million, nine hundred forty-three thousand, nine hundred ninety-one".