4213247621 has 4 divisors (see below), whose sum is σ = 4596270144. Its totient is φ = 3830225100.

The previous prime is 4213247593. The next prime is 4213247659. The reversal of 4213247621 is 1267423124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4213247621 - 2¹⁸ = 4212985477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4213247221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191511245 + ... + 191511266.

It is an arithmetic number, because the mean of its divisors is an integer number (1149067536).

Almost surely, 2^4213247621 is an apocalyptic number.

It is an amenable number.

4213247621 is a deficient number, since it is larger than the sum of its proper divisors (383022523).

4213247621 is a wasteful number, since it uses less digits than its factorization.

4213247621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383022522.

The product of its digits is 16128, while the sum is 32.

The square root of 4213247621 is about 64909.5341302031. The cubic root of 4213247621 is about 1615.1232220422.

The spelling of 4213247621 in words is "four billion, two hundred thirteen million, two hundred forty-seven thousand, six hundred twenty-one".