402223011991 has 2 divisors, whose sum is σ = 402223011992. Its totient is φ = 402223011990.

The previous prime is 402223011977. The next prime is 402223012003. The reversal of 402223011991 is 199110322204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402223011991 - 2¹¹ = 402223009943 is a prime.

It is a super-2 number, since 2×402223011991² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402223011961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201111505995 + 201111505996.

It is an arithmetic number, because the mean of its divisors is an integer number (201111505996).

Almost surely, 2^402223011991 is an apocalyptic number.

402223011991 is a deficient number, since it is larger than the sum of its proper divisors (1).

402223011991 is an equidigital number, since it uses as much as digits as its factorization.

402223011991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 402223011991 in words is "four hundred two billion, two hundred twenty-three million, eleven thousand, nine hundred ninety-one".