72233431 has 8 divisors (see below), whose sum is σ = 74151504. Its totient is φ = 70322880.

The previous prime is 72233429. The next prime is 72233467. The reversal of 72233431 is 13433227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72233431 - 2¹ = 72233429 is a prime.

It is a super-2 number, since 2×72233431² = 10435337108063522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72233396 and 72233405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72233401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21256 + ... + 24418.

It is an arithmetic number, because the mean of its divisors is an integer number (9268938).

Almost surely, 2^72233431 is an apocalyptic number.

72233431 is a deficient number, since it is larger than the sum of its proper divisors (1918073).

72233431 is a wasteful number, since it uses less digits than its factorization.

72233431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3761.

The product of its digits is 3024, while the sum is 25.

The square root of 72233431 is about 8499.0252970561. The cubic root of 72233431 is about 416.4658685456.

Adding to 72233431 its reverse (13433227), we get a palindrome (85666658).

The spelling of 72233431 in words is "seventy-two million, two hundred thirty-three thousand, four hundred thirty-one".