752027221 has 6 divisors (see below), whose sum is σ = 826608566. Its totient is φ = 683661000.

The previous prime is 752027203. The next prime is 752027261. The reversal of 752027221 is 122720257.

It can be written as a sum of positive squares in only one way, i.e., 414570321 + 337456900 = 20361^2 + 18370^2 .

It is not a de Polignac number, because 752027221 - 2¹¹ = 752025173 is a prime.

It is a super-2 number, since 2×752027221² = 1131089882249965682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 752027221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (752027261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3107430 + ... + 3107671.

Almost surely, 2^752027221 is an apocalyptic number.

It is an amenable number.

752027221 is a deficient number, since it is larger than the sum of its proper divisors (74581345).

752027221 is a wasteful number, since it uses less digits than its factorization.

752027221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215123 (or 6215112 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 752027221 is about 27423.1147209795. The cubic root of 752027221 is about 909.3781610893.

Adding to 752027221 its reverse (122720257), we get a palindrome (874747478).

The spelling of 752027221 in words is "seven hundred fifty-two million, twenty-seven thousand, two hundred twenty-one".