551321030232 has 384 divisors, whose sum is σ = 1927074240000. Its totient is φ = 144081939456.

The previous prime is 551321030173. The next prime is 551321030303. The reversal of 551321030232 is 232030123155.

It is a happy number.

551321030232 is a `hidden beast` number, since 5 + 5 + 1 + 321 + 0 + 302 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 551321030196 and 551321030205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7461244 + ... + 7534772.

It is an arithmetic number, because the mean of its divisors is an integer number (5018422500).

Almost surely, 2^551321030232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551321030232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963537120000).

551321030232 is an abundant number, since it is smaller than the sum of its proper divisors (1375753209768).

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

551321030232 is a wasteful number, since it uses less digits than its factorization.

551321030232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73605 (or 73589 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 551321030232 its reverse (232030123155), we get a palindrome (783351153387).

The spelling of 551321030232 in words is "five hundred fifty-one billion, three hundred twenty-one million, thirty thousand, two hundred thirty-two".