551353240 has 128 divisors (see below), whose sum is σ = 1358622720. Its totient is φ = 200780800.

The previous prime is 551353207. The next prime is 551353241. The reversal of 551353240 is 42353155.

It is a junction number, because it is equal to n+sod(n) for n = 551353199 and 551353208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551353241) 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, 1772685 + ... + 1772995.

It is an arithmetic number, because the mean of its divisors is an integer number (10614240).

Almost surely, 2^551353240 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 551353240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (679311360).

551353240 is an abundant number, since it is smaller than the sum of its proper divisors (807269480).

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

551353240 is a wasteful number, since it uses less digits than its factorization.

551353240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 551353240 is about 23480.9122480367. The cubic root of 551353240 is about 819.9926828615.

The spelling of 551353240 in words is "five hundred fifty-one million, three hundred fifty-three thousand, two hundred forty".