72031433 has 4 divisors (see below), whose sum is σ = 72393600. Its totient is φ = 71669268.

The previous prime is 72031411. The next prime is 72031439. The reversal of 72031433 is 33413027.

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 72031433 - 2¹⁴ = 72015049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72031399 and 72031408.

It is not an unprimeable number, because it can be changed into a prime (72031439) 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, 180785 + ... + 181182.

It is an arithmetic number, because the mean of its divisors is an integer number (18098400).

Almost surely, 2^72031433 is an apocalyptic number.

It is an amenable number.

72031433 is a deficient number, since it is larger than the sum of its proper divisors (362167).

72031433 is a wasteful number, since it uses less digits than its factorization.

72031433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362166.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 72031433 is about 8487.1333794162. The cubic root of 72031433 is about 416.0772958718.

The spelling of 72031433 in words is "seventy-two million, thirty-one thousand, four hundred thirty-three".