1223401567 has 2 divisors, whose sum is σ = 1223401568. Its totient is φ = 1223401566.

The previous prime is 1223401561. The next prime is 1223401603. The reversal of 1223401567 is 7651043221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223401567 is a prime.

It is a super-2 number, since 2×1223401567² = 2993422788276110978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223401561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611700783 + 611700784.

It is an arithmetic number, because the mean of its divisors is an integer number (611700784).

Almost surely, 2^1223401567 is an apocalyptic number.

1223401567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223401567 is an equidigital number, since it uses as much as digits as its factorization.

1223401567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1223401567 is about 34977.1577890486. The cubic root of 1223401567 is about 1069.5218893458.

Adding to 1223401567 its reverse (7651043221), we get a palindrome (8874444788).

The spelling of 1223401567 in words is "one billion, two hundred twenty-three million, four hundred one thousand, five hundred sixty-seven".