551725440 has 128 divisors (see below), whose sum is σ = 2009905920. Its totient is φ = 126105600.

The previous prime is 551725411. The next prime is 551725453. The reversal of 551725440 is 44527155.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×551725440² = 608801922286387200, which contains 22 as substring.

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, 7086 + ... + 33965.

It is an arithmetic number, because the mean of its divisors is an integer number (15702390).

Almost surely, 2^551725440 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 551725440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1004952960).

551725440 is an abundant number, since it is smaller than the sum of its proper divisors (1458180480).

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

551725440 is a wasteful number, since it uses less digits than its factorization.

551725440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41080 (or 41068 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 551725440 is about 23488.8364973661. The cubic root of 551725440 is about 820.1771578364.

The spelling of 551725440 in words is "five hundred fifty-one million, seven hundred twenty-five thousand, four hundred forty".