72205043 has 4 divisors (see below), whose sum is σ = 72222048. Its totient is φ = 72188040.

The previous prime is 72205039. The next prime is 72205051. The reversal of 72205043 is 34050227.

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: 34050227 = 227 ⋅150001.

It is a cyclic number.

It is not a de Polignac number, because 72205043 - 2² = 72205039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72205033) 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, 3830 + ... + 12612.

It is an arithmetic number, because the mean of its divisors is an integer number (18055512).

Almost surely, 2^72205043 is an apocalyptic number.

72205043 is a deficient number, since it is larger than the sum of its proper divisors (17005).

72205043 is an equidigital number, since it uses as much as digits as its factorization.

72205043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17004.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 72205043 is about 8497.3550590757. The cubic root of 72205043 is about 416.4113038654.

The spelling of 72205043 in words is "seventy-two million, two hundred five thousand, forty-three".