551633340 has 96 divisors (see below), whose sum is σ = 1640520000. Its totient is φ = 138018816.

The previous prime is 551633339. The next prime is 551633347. The reversal of 551633340 is 43336155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 551633298 and 551633307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551633347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441036 + ... + 442284.

It is an arithmetic number, because the mean of its divisors is an integer number (17088750).

Almost surely, 2^551633340 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 551633340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820260000).

551633340 is an abundant number, since it is smaller than the sum of its proper divisors (1088886660).

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

551633340 is a wasteful number, since it uses less digits than its factorization.

551633340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 551633340 is about 23486.8759097501. The cubic root of 551633340 is about 820.1315176717.

Adding to 551633340 its reverse (43336155), we get a palindrome (594969495).

The spelling of 551633340 in words is "five hundred fifty-one million, six hundred thirty-three thousand, three hundred forty".