551752272 has 120 divisors (see below), whose sum is σ = 1643205096. Its totient is φ = 172228608.

The previous prime is 551752261. The next prime is 551752273. The reversal of 551752272 is 272257155.

551752272 is a `hidden beast` number, since 55 + 17 + 522 + 72 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 419594256 + 132158016 = 20484^2 + 11496^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551752273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 628698 + ... + 629574.

Almost surely, 2^551752272 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 551752272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821602548).

551752272 is an abundant number, since it is smaller than the sum of its proper divisors (1091452824).

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

551752272 is a wasteful number, since it uses less digits than its factorization.

551752272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1156 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 551752272 is about 23489.4076553667. The cubic root of 551752272 is about 820.1904534814.

The spelling of 551752272 in words is "five hundred fifty-one million, seven hundred fifty-two thousand, two hundred seventy-two".