23211785851 has 2 divisors, whose sum is σ = 23211785852. Its totient is φ = 23211785850.

The previous prime is 23211785843. The next prime is 23211785869. The reversal of 23211785851 is 15858711232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23211785851 - 2³ = 23211785843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23211785798 and 23211785807.

It is not a weakly prime, because it can be changed into another prime (23211785351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11605892925 + 11605892926.

It is an arithmetic number, because the mean of its divisors is an integer number (11605892926).

Almost surely, 2^23211785851 is an apocalyptic number.

23211785851 is a deficient number, since it is larger than the sum of its proper divisors (1).

23211785851 is an equidigital number, since it uses as much as digits as its factorization.

23211785851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 43.

The spelling of 23211785851 in words is "twenty-three billion, two hundred eleven million, seven hundred eighty-five thousand, eight hundred fifty-one".