551451320 has 64 divisors (see below), whose sum is σ = 1438041600. Its totient is φ = 186399360.

The previous prime is 551451301. The next prime is 551451349. The reversal of 551451320 is 23154155.

It is a self number, because there is not a number n which added to its sum of digits gives 551451320.

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, 6011 + ... + 33749.

It is an arithmetic number, because the mean of its divisors is an integer number (22469400).

Almost surely, 2^551451320 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 551451320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719020800).

551451320 is an abundant number, since it is smaller than the sum of its proper divisors (886590280).

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

551451320 is a wasteful number, since it uses less digits than its factorization.

551451320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27828 (or 27824 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 551451320 is about 23483.0006600519. Note that the first 3 decimals coincide. The cubic root of 551451320 is about 820.0413026985.

It can be divided in two parts, 55145 and 1320, that added together give a palindrome (56465).

The spelling of 551451320 in words is "five hundred fifty-one million, four hundred fifty-one thousand, three hundred twenty".