1223131229 has 8 divisors (see below), whose sum is σ = 1253810040. Its totient is φ = 1192492800.

The previous prime is 1223131223. The next prime is 1223131277. The reversal of 1223131229 is 9221313221.

It can be written as a sum of positive squares in 4 ways, for example, as 197402500 + 1025728729 = 14050^2 + 32027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223131229 - 2¹² = 1223127133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1223131198 and 1223131207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223131223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56699 + ... + 75239.

It is an arithmetic number, because the mean of its divisors is an integer number (156726255).

Almost surely, 2^1223131229 is an apocalyptic number.

It is an amenable number.

1223131229 is a deficient number, since it is larger than the sum of its proper divisors (30678811).

1223131229 is a wasteful number, since it uses less digits than its factorization.

1223131229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20191.

The product of its digits is 1296, while the sum is 26.

The square root of 1223131229 is about 34973.2930820076. The cubic root of 1223131229 is about 1069.4431052639.

The spelling of 1223131229 in words is "one billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-nine".