1229555613 has 24 divisors (see below), whose sum is σ = 1936608480. Its totient is φ = 687860160.

The previous prime is 1229555581. The next prime is 1229555623. The reversal of 1229555613 is 3165559221.

It is not a de Polignac number, because 1229555613 - 2⁵ = 1229555581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229555623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104658 + ... + 115811.

It is an arithmetic number, because the mean of its divisors is an integer number (80692020).

Almost surely, 2^1229555613 is an apocalyptic number.

1229555613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1229555613 is a deficient number, since it is larger than the sum of its proper divisors (707052867).

1229555613 is a wasteful number, since it uses less digits than its factorization.

1229555613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220509 (or 220496 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 1229555613 is about 35065.0197918096. The cubic root of 1229555613 is about 1071.3122203889.

The spelling of 1229555613 in words is "one billion, two hundred twenty-nine million, five hundred fifty-five thousand, six hundred thirteen".