552181820 has 24 divisors (see below), whose sum is σ = 1160535600. Its totient is φ = 220691072.

The previous prime is 552181801. The next prime is 552181829. The reversal of 552181820 is 28181255.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (552181829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15071 + ... + 36489.

It is an arithmetic number, because the mean of its divisors is an integer number (48355650).

Almost surely, 2^552181820 is an apocalyptic number.

It is an amenable number.

552181820 is an abundant number, since it is smaller than the sum of its proper divisors (608353780).

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

552181820 is a wasteful number, since it uses less digits than its factorization.

552181820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22717 (or 22715 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 552181820 is about 23498.5493169259. The cubic root of 552181820 is about 820.4032420822.

The spelling of 552181820 in words is "five hundred fifty-two million, one hundred eighty-one thousand, eight hundred twenty".