1232155569 has 4 divisors (see below), whose sum is σ = 1642874096. Its totient is φ = 821437044.

The previous prime is 1232155549. The next prime is 1232155633. The reversal of 1232155569 is 9655512321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1232155569 - 2¹¹ = 1232153521 is a prime.

It is a super-2 number, since 2×1232155569² = 3036414692435427522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232155549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205359259 + ... + 205359264.

It is an arithmetic number, because the mean of its divisors is an integer number (410718524).

Almost surely, 2^1232155569 is an apocalyptic number.

It is an amenable number.

1232155569 is a deficient number, since it is larger than the sum of its proper divisors (410718527).

1232155569 is an equidigital number, since it uses as much as digits as its factorization.

1232155569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410718526.

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

The square root of 1232155569 is about 35102.0735712294. The cubic root of 1232155569 is about 1072.0668029512.

The spelling of 1232155569 in words is "one billion, two hundred thirty-two million, one hundred fifty-five thousand, five hundred sixty-nine".