43213801 has 4 divisors (see below), whose sum is σ = 43227604. Its totient is φ = 43200000.

The previous prime is 43213789. The next prime is 43213831. The reversal of 43213801 is 10831234.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10831234 = 2 ⋅5415617.

It can be written as a sum of positive squares in 2 ways, for example, as 15808576 + 27405225 = 3976^2 + 5235^2 .

It is a 3-Lehmer number, since φ(43213801) divides (43213801-1)³.

It is a cyclic number.

It is not a de Polignac number, because 43213801 - 2¹³ = 43205609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43213831) 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, 301 + ... + 9301.

It is an arithmetic number, because the mean of its divisors is an integer number (10806901).

Almost surely, 2^43213801 is an apocalyptic number.

It is an amenable number.

43213801 is a deficient number, since it is larger than the sum of its proper divisors (13803).

43213801 is an equidigital number, since it uses as much as digits as its factorization.

43213801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13802.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 43213801 is about 6573.7204838660. The cubic root of 43213801 is about 350.9194897636.

The spelling of 43213801 in words is "forty-three million, two hundred thirteen thousand, eight hundred one".