551772 has 60 divisors (see below), whose sum is σ = 1565256. Its totient is φ = 168480.

The previous prime is 551767. The next prime is 551773. The reversal of 551772 is 277155.

551772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551773) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4147 + ... + 4277.

2⁵⁵¹⁷⁷² is an apocalyptic number.

551772 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (782628).

551772 is an abundant number, since it is smaller than the sum of its proper divisors (1013484).

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

551772 is a wasteful number, since it uses less digits than its factorization.

551772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 149 counting only the distinct ones).

The product of its digits is 2450, while the sum is 27.

The square root of 551772 is about 742.8135701507. The cubic root of 551772 is about 82.0200228716.

The spelling of 551772 in words is "five hundred fifty-one thousand, seven hundred seventy-two".