1223231851 has 2 divisors, whose sum is σ = 1223231852. Its totient is φ = 1223231850.

The previous prime is 1223231833. The next prime is 1223231887. The reversal of 1223231851 is 1581323221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223231851 - 2⁵ = 1223231819 is a prime.

It is a super-2 number, since 2×1223231851² = 2992592322601772402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1223234851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611615925 + 611615926.

It is an arithmetic number, because the mean of its divisors is an integer number (611615926).

Almost surely, 2^1223231851 is an apocalyptic number.

1223231851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223231851 is an equidigital number, since it uses as much as digits as its factorization.

1223231851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 1223231851 is about 34974.7316072618. The cubic root of 1223231851 is about 1069.4724306954.

The spelling of 1223231851 in words is "one billion, two hundred twenty-three million, two hundred thirty-one thousand, eight hundred fifty-one".