551225632 has 24 divisors (see below), whose sum is σ = 1120234752. Its totient is φ = 266721600.

The previous prime is 551225627. The next prime is 551225641. The reversal of 551225632 is 236522155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 551225594 and 551225603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276844 + ... + 278827.

It is an arithmetic number, because the mean of its divisors is an integer number (46676448).

Almost surely, 2^551225632 is an apocalyptic number.

It is an amenable number.

551225632 is an abundant number, since it is smaller than the sum of its proper divisors (569009120).

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

551225632 is a wasteful number, since it uses less digits than its factorization.

551225632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555712 (or 555704 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 551225632 is about 23478.1948198749. The cubic root of 551225632 is about 819.9294168871.

Adding to 551225632 its reverse (236522155), we get a palindrome (787747787).

The spelling of 551225632 in words is "five hundred fifty-one million, two hundred twenty-five thousand, six hundred thirty-two".