72213433671 has 4 divisors (see below), whose sum is σ = 96284578232. Its totient is φ = 48142289112.

The previous prime is 72213433657. The next prime is 72213433723. The reversal of 72213433671 is 17633431227.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-72213433671 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 (72213433601) 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, 12035572276 + ... + 12035572281.

It is an arithmetic number, because the mean of its divisors is an integer number (24071144558).

Almost surely, 2^72213433671 is an apocalyptic number.

72213433671 is a deficient number, since it is larger than the sum of its proper divisors (24071144561).

72213433671 is a wasteful number, since it uses less digits than its factorization.

72213433671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24071144560.

The product of its digits is 127008, while the sum is 39.

Adding to 72213433671 its reverse (17633431227), we get a palindrome (89846864898).

The spelling of 72213433671 in words is "seventy-two billion, two hundred thirteen million, four hundred thirty-three thousand, six hundred seventy-one".