36223123991 has 2 divisors, whose sum is σ = 36223123992. Its totient is φ = 36223123990.

The previous prime is 36223123973. The next prime is 36223123997. The reversal of 36223123991 is 19932132263.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36223123991 - 2¹⁴ = 36223107607 is a prime.

It is a super-2 number, since 2×36223123991² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36223123997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18111561995 + 18111561996.

It is an arithmetic number, because the mean of its divisors is an integer number (18111561996).

Almost surely, 2^36223123991 is an apocalyptic number.

36223123991 is a deficient number, since it is larger than the sum of its proper divisors (1).

36223123991 is an equidigital number, since it uses as much as digits as its factorization.

36223123991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 41.

The spelling of 36223123991 in words is "thirty-six billion, two hundred twenty-three million, one hundred twenty-three thousand, nine hundred ninety-one".