5640517221 has 8 divisors (see below), whose sum is σ = 7521044640. Its totient is φ = 3760167312.

The previous prime is 5640517147. The next prime is 5640517229. The reversal of 5640517221 is 1227150465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5640517221 - 2¹⁴ = 5640500837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640517229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77911 + ... + 131723.

It is an arithmetic number, because the mean of its divisors is an integer number (940130580).

Almost surely, 2^5640517221 is an apocalyptic number.

It is an amenable number.

5640517221 is a deficient number, since it is larger than the sum of its proper divisors (1880527419).

5640517221 is a wasteful number, since it uses less digits than its factorization.

5640517221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88755.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 5640517221 is about 75103.3768947842. The cubic root of 5640517221 is about 1780.0805018720.

Adding to 5640517221 its reverse (1227150465), we get a palindrome (6867667686).

The spelling of 5640517221 in words is "five billion, six hundred forty million, five hundred seventeen thousand, two hundred twenty-one".