621722552 has 48 divisors (see below), whose sum is σ = 1302308280. Its totient is φ = 275956800.

The previous prime is 621722551. The next prime is 621722557. The reversal of 621722552 is 255227126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621722551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160802 + ... + 164622.

Almost surely, 2^621722552 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 621722552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651154140).

621722552 is an abundant number, since it is smaller than the sum of its proper divisors (680585728).

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

621722552 is a wasteful number, since it uses less digits than its factorization.

621722552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924 (or 3877 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 621722552 is about 24934.3648806221. The cubic root of 621722552 is about 853.4908580991.

Adding to 621722552 its reverse (255227126), we get a palindrome (876949678).

The spelling of 621722552 in words is "six hundred twenty-one million, seven hundred twenty-two thousand, five hundred fifty-two".