423431231 has 8 divisors (see below), whose sum is σ = 439252800. Its totient is φ = 407871360.

The previous prime is 423431221. The next prime is 423431251. The reversal of 423431231 is 132134324.

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-423431231 is a prime.

It is a super-2 number, since 2×423431231² = 358588014772350722, 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 = 423431197 and 423431206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423431221) 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, 62126 + ... + 68603.

It is an arithmetic number, because the mean of its divisors is an integer number (54906600).

Almost surely, 2^423431231 is an apocalyptic number.

423431231 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

423431231 is a deficient number, since it is larger than the sum of its proper divisors (15821569).

423431231 is a wasteful number, since it uses less digits than its factorization.

423431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130849.

The product of its digits is 1728, while the sum is 23.

The square root of 423431231 is about 20577.4447150272. Note that the first 3 decimals coincide. The cubic root of 423431231 is about 750.9210793171.

Adding to 423431231 its reverse (132134324), we get a palindrome (555565555).

The spelling of 423431231 in words is "four hundred twenty-three million, four hundred thirty-one thousand, two hundred thirty-one".