4520241621 has 24 divisors (see below), whose sum is σ = 7614276800. Its totient is φ = 2582993448.

The previous prime is 4520241611. The next prime is 4520241647. The reversal of 4520241621 is 1261420254.

4520241621 is a `hidden beast` number, since 45 + 202 + 416 + 2 + 1 = 666.

It is not a de Polignac number, because 4520241621 - 2¹⁵ = 4520208853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4520241611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 729055 + ... + 735228.

Almost surely, 2^4520241621 is an apocalyptic number.

It is an amenable number.

4520241621 is a deficient number, since it is larger than the sum of its proper divisors (3094035179).

4520241621 is a wasteful number, since it uses less digits than its factorization.

4520241621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464310 (or 1464293 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 4520241621 is about 67232.7421796850. The cubic root of 4520241621 is about 1653.4353428386.

Adding to 4520241621 its reverse (1261420254), we get a palindrome (5781661875).

The spelling of 4520241621 in words is "four billion, five hundred twenty million, two hundred forty-one thousand, six hundred twenty-one".