72472431 has 8 divisors (see below), whose sum is σ = 96843184. Its totient is φ = 48208320.

The previous prime is 72472399. The next prime is 72472457. The reversal of 72472431 is 13427427.

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

It is not a de Polignac number, because 72472431 - 2⁵ = 72472399 is a prime.

It is a super-2 number, since 2×72472431² = 10504506510099522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72472481) 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, 25060 + ... + 27801.

It is an arithmetic number, because the mean of its divisors is an integer number (12105398).

Almost surely, 2^72472431 is an apocalyptic number.

72472431 is a deficient number, since it is larger than the sum of its proper divisors (24370753).

72472431 is a wasteful number, since it uses less digits than its factorization.

72472431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53321.

The product of its digits is 9408, while the sum is 30.

The square root of 72472431 is about 8513.0741216085. The cubic root of 72472431 is about 416.9246854879.

Adding to 72472431 its reverse (13427427), we get a palindrome (85899858).

The spelling of 72472431 in words is "seventy-two million, four hundred seventy-two thousand, four hundred thirty-one".