553213566 has 48 divisors (see below), whose sum is σ = 1239402528. Its totient is φ = 178200000.

The previous prime is 553213543. The next prime is 553213567. The reversal of 553213566 is 665312355.

553213566 is a `hidden beast` number, since 55 + 32 + 13 + 566 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 553213566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553213567) 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, 97816 + ... + 103316.

It is an arithmetic number, because the mean of its divisors is an integer number (25820886).

Almost surely, 2^553213566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 553213566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619701264).

553213566 is an abundant number, since it is smaller than the sum of its proper divisors (686188962).

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

553213566 is a wasteful number, since it uses less digits than its factorization.

553213566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697 (or 5694 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 553213566 is about 23520.4924693341. The cubic root of 553213566 is about 820.9138958115.

The spelling of 553213566 in words is "five hundred fifty-three million, two hundred thirteen thousand, five hundred sixty-six".