1329438551 has 12 divisors (see below), whose sum is σ = 1567678752. Its totient is φ = 1123905888.

The previous prime is 1329438541. The next prime is 1329438553. The reversal of 1329438551 is 1558349231.

It is not a de Polignac number, because 1329438551 - 2¹⁴ = 1329422167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1329438499 and 1329438508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329438553) 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, 182255 + ... + 189408.

It is an arithmetic number, because the mean of its divisors is an integer number (130639896).

Almost surely, 2^1329438551 is an apocalyptic number.

1329438551 is a deficient number, since it is larger than the sum of its proper divisors (238240201).

1329438551 is an equidigital number, since it uses as much as digits as its factorization.

1329438551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371750 (or 371743 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 1329438551 is about 36461.4666600234. The cubic root of 1329438551 is about 1099.5696804414.

The spelling of 1329438551 in words is "one billion, three hundred twenty-nine million, four hundred thirty-eight thousand, five hundred fifty-one".