553621432 has 64 divisors (see below), whose sum is σ = 1287014400. Its totient is φ = 217399680.

The previous prime is 553621427. The next prime is 553621451. The reversal of 553621432 is 234126355.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 553621394 and 553621403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98457 + ... + 103927.

It is an arithmetic number, because the mean of its divisors is an integer number (20109600).

Almost surely, 2^553621432 is an apocalyptic number.

553621432 is a gapful number since it is divisible by the number (52) 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 553621432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (643507200).

553621432 is an abundant number, since it is smaller than the sum of its proper divisors (733392968).

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

553621432 is a wasteful number, since it uses less digits than its factorization.

553621432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636 (or 5632 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 553621432 is about 23529.1613110200. The cubic root of 553621432 is about 821.1155904413.

Adding to 553621432 its reverse (234126355), we get a palindrome (787747787).

The spelling of 553621432 in words is "five hundred fifty-three million, six hundred twenty-one thousand, four hundred thirty-two".