531722568 has 64 divisors (see below), whose sum is σ = 1448879040. Its totient is φ = 161627904.

The previous prime is 531722567. The next prime is 531722641. The reversal of 531722568 is 865227135.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (531722561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15630 + ... + 36162.

It is an arithmetic number, because the mean of its divisors is an integer number (22638735).

Almost surely, 2^531722568 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 531722568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724439520).

531722568 is an abundant number, since it is smaller than the sum of its proper divisors (917156472).

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

531722568 is a wasteful number, since it uses less digits than its factorization.

531722568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20638 (or 20634 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 531722568 is about 23059.1103037390. The cubic root of 531722568 is about 810.1430261077.

The spelling of 531722568 in words is "five hundred thirty-one million, seven hundred twenty-two thousand, five hundred sixty-eight".