1551224424432 has 80 divisors (see below), whose sum is σ = 4058669514240. Its totient is φ = 510452307456.

The previous prime is 1551224424413. The next prime is 1551224424433. The reversal of 1551224424432 is 2344244221551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551224424433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28500028 + ... + 28554404.

It is an arithmetic number, because the mean of its divisors is an integer number (50733368928).

Almost surely, 2^{1551224424432} is an apocalyptic number.

1551224424432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551224424432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2029334757120).

1551224424432 is an abundant number, since it is smaller than the sum of its proper divisors (2507445089808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1551224424432 is a wasteful number, since it uses less digits than its factorization.

1551224424432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61990 (or 61984 counting only the distinct ones).

The product of its digits is 307200, while the sum is 39.

Adding to 1551224424432 its reverse (2344244221551), we get a palindrome (3895468645983).

The spelling of 1551224424432 in words is "one trillion, five hundred fifty-one billion, two hundred twenty-four million, four hundred twenty-four thousand, four hundred thirty-two".