72219841 has 4 divisors (see below), whose sum is σ = 72331092. Its totient is φ = 72108592.

The previous prime is 72219821. The next prime is 72219857. The reversal of 72219841 is 14891227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14891227 = 13 ⋅1145479.

It can be written as a sum of positive squares in 2 ways, for example, as 33593616 + 38626225 = 5796^2 + 6215^2 .

It is a cyclic number.

It is not a de Polignac number, because 72219841 - 2¹¹ = 72217793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72219797 and 72219806.

It is not an unprimeable number, because it can be changed into a prime (72219821) 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, 54646 + ... + 55951.

It is an arithmetic number, because the mean of its divisors is an integer number (18082773).

Almost surely, 2^72219841 is an apocalyptic number.

It is an amenable number.

72219841 is a deficient number, since it is larger than the sum of its proper divisors (111251).

72219841 is a wasteful number, since it uses less digits than its factorization.

72219841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111250.

The product of its digits is 8064, while the sum is 34.

The square root of 72219841 is about 8498.2257560034. The cubic root of 72219841 is about 416.4397489402.

The spelling of 72219841 in words is "seventy-two million, two hundred nineteen thousand, eight hundred forty-one".