4213523021 has 4 divisors (see below), whose sum is σ = 4222320000. Its totient is φ = 4204726044.

The previous prime is 4213523003. The next prime is 4213523029. The reversal of 4213523021 is 1203253124.

4213523021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4213523021 - 2²⁶ = 4146414157 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 (4213523029) 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, 4397771 + ... + 4398728.

It is an arithmetic number, because the mean of its divisors is an integer number (1055580000).

Almost surely, 2^4213523021 is an apocalyptic number.

It is an amenable number.

4213523021 is a deficient number, since it is larger than the sum of its proper divisors (8796979).

4213523021 is an equidigital number, since it uses as much as digits as its factorization.

4213523021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8796978.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 4213523021 is about 64911.6555096232. The cubic root of 4213523021 is about 1615.1584122553.

Adding to 4213523021 its reverse (1203253124), we get a palindrome (5416776145).

It can be divided in two parts, 42135 and 23021, that added together give a palindrome (65156).

The spelling of 4213523021 in words is "four billion, two hundred thirteen million, five hundred twenty-three thousand, twenty-one".