1226256311 has 12 divisors (see below), whose sum is σ = 1447755768. Its totient is φ = 1035386352.

The previous prime is 1226256287. The next prime is 1226256319. The reversal of 1226256311 is 1136526221.

It is not a de Polignac number, because 1226256311 - 2¹⁰ = 1226255287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226256319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183476 + ... + 190041.

It is an arithmetic number, because the mean of its divisors is an integer number (120646314).

Almost surely, 2^1226256311 is an apocalyptic number.

1226256311 is a deficient number, since it is larger than the sum of its proper divisors (221499457).

1226256311 is an equidigital number, since it uses as much as digits as its factorization.

1226256311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373598 (or 373591 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1226256311 is about 35017.9427008498. The cubic root of 1226256311 is about 1070.3531343804.

The spelling of 1226256311 in words is "one billion, two hundred twenty-six million, two hundred fifty-six thousand, three hundred eleven".