4213531421 has 4 divisors (see below), whose sum is σ = 4596579744. Its totient is φ = 3830483100.

The previous prime is 4213531411. The next prime is 4213531471. The reversal of 4213531421 is 1241353124.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-4213531421 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 (4213531411) 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, 191524145 + ... + 191524166.

It is an arithmetic number, because the mean of its divisors is an integer number (1149144936).

Almost surely, 2^4213531421 is an apocalyptic number.

It is an amenable number.

4213531421 is a deficient number, since it is larger than the sum of its proper divisors (383048323).

4213531421 is a wasteful number, since it uses less digits than its factorization.

4213531421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383048322.

The product of its digits is 2880, while the sum is 26.

The square root of 4213531421 is about 64911.7202129169. The cubic root of 4213531421 is about 1615.1594855710.

Adding to 4213531421 its reverse (1241353124), we get a palindrome (5454884545).

The spelling of 4213531421 in words is "four billion, two hundred thirteen million, five hundred thirty-one thousand, four hundred twenty-one".