43213301421 has 4 divisors (see below), whose sum is σ = 57617735232. Its totient is φ = 28808867612.

The previous prime is 43213301381. The next prime is 43213301423. The reversal of 43213301421 is 12410331234.

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 not a de Polignac number, because 43213301421 - 2¹⁰ = 43213300397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43213301391 and 43213301400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43213301423) 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, 7202216901 + ... + 7202216906.

It is an arithmetic number, because the mean of its divisors is an integer number (14404433808).

Almost surely, 2^43213301421 is an apocalyptic number.

It is an amenable number.

43213301421 is a deficient number, since it is larger than the sum of its proper divisors (14404433811).

43213301421 is a wasteful number, since it uses less digits than its factorization.

43213301421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14404433810.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 43213301421 its reverse (12410331234), we get a palindrome (55623632655).

The spelling of 43213301421 in words is "forty-three billion, two hundred thirteen million, three hundred one thousand, four hundred twenty-one".