1225523111 has 2 divisors, whose sum is σ = 1225523112. Its totient is φ = 1225523110.

The previous prime is 1225523069. The next prime is 1225523113. The reversal of 1225523111 is 1113255221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225523111 is a prime.

It is a super-3 number, since 3×1225523111³ (a number of 28 digits) contains 333 as substring.

Together with 1225523113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225523113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612761555 + 612761556.

It is an arithmetic number, because the mean of its divisors is an integer number (612761556).

Almost surely, 2^1225523111 is an apocalyptic number.

1225523111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225523111 is an equidigital number, since it uses as much as digits as its factorization.

1225523111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 23.

The square root of 1225523111 is about 35007.4722166568. The cubic root of 1225523111 is about 1070.1397642568.

Adding to 1225523111 its reverse (1113255221), we get a palindrome (2338778332).

The spelling of 1225523111 in words is "one billion, two hundred twenty-five million, five hundred twenty-three thousand, one hundred eleven".