722021552 has 120 divisors (see below), whose sum is σ = 1746075744. Its totient is φ = 282341376.

The previous prime is 722021519. The next prime is 722021561. The reversal of 722021552 is 255120227.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2606438 + ... + 2606714.

Almost surely, 2^722021552 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 722021552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873037872).

722021552 is an abundant number, since it is smaller than the sum of its proper divisors (1024054192).

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

722021552 is a wasteful number, since it uses less digits than its factorization.

722021552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 722021552 is about 26870.4587232894. The cubic root of 722021552 is about 897.1189981271.

Adding to 722021552 its reverse (255120227), we get a palindrome (977141779).

The spelling of 722021552 in words is "seven hundred twenty-two million, twenty-one thousand, five hundred fifty-two".