72453431231 has 8 divisors (see below), whose sum is σ = 78499477584. Its totient is φ = 66605616000.

The previous prime is 72453431221. The next prime is 72453431257. The reversal of 72453431231 is 13213435427.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72453431231 is a prime.

It is a super-2 number, since 2×72453431231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72453431191 and 72453431200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72453431201) 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, 49557020 + ... + 49558481.

It is an arithmetic number, because the mean of its divisors is an integer number (9812434698).

Almost surely, 2^72453431231 is an apocalyptic number.

72453431231 is a deficient number, since it is larger than the sum of its proper divisors (6046046353).

72453431231 is a wasteful number, since it uses less digits than its factorization.

72453431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99115561.

The product of its digits is 60480, while the sum is 35.

Adding to 72453431231 its reverse (13213435427), we get a palindrome (85666866658).

The spelling of 72453431231 in words is "seventy-two billion, four hundred fifty-three million, four hundred thirty-one thousand, two hundred thirty-one".