423031511 has 4 divisors (see below), whose sum is σ = 483464592. Its totient is φ = 362598432.

The previous prime is 423031457. The next prime is 423031547. The reversal of 423031511 is 115130324.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 423031511 - 2¹⁸ = 422769367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423031811) 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, 30216530 + ... + 30216543.

It is an arithmetic number, because the mean of its divisors is an integer number (120866148).

Almost surely, 2^423031511 is an apocalyptic number.

423031511 is a deficient number, since it is larger than the sum of its proper divisors (60433081).

423031511 is an equidigital number, since it uses as much as digits as its factorization.

423031511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60433080.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 423031511 is about 20567.7298455615. The cubic root of 423031511 is about 750.6847145496.

Adding to 423031511 its reverse (115130324), we get a palindrome (538161835).

The spelling of 423031511 in words is "four hundred twenty-three million, thirty-one thousand, five hundred eleven".