423521567 has 4 divisors (see below), whose sum is σ = 484024656. Its totient is φ = 363018480.

The previous prime is 423521557. The next prime is 423521599. The reversal of 423521567 is 765125324.

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

It is a cyclic number.

It is not a de Polignac number, because 423521567 - 2⁸ = 423521311 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 (423521557) 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, 30251534 + ... + 30251547.

It is an arithmetic number, because the mean of its divisors is an integer number (121006164).

Almost surely, 2^423521567 is an apocalyptic number.

423521567 is a deficient number, since it is larger than the sum of its proper divisors (60503089).

423521567 is an equidigital number, since it uses as much as digits as its factorization.

423521567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60503088.

The product of its digits is 50400, while the sum is 35.

The square root of 423521567 is about 20579.6396226950. The cubic root of 423521567 is about 750.9744767192.

The spelling of 423521567 in words is "four hundred twenty-three million, five hundred twenty-one thousand, five hundred sixty-seven".