423115521 has 8 divisors (see below), whose sum is σ = 588682560. Its totient is φ = 269812752.

The previous prime is 423115513. The next prime is 423115603. The reversal of 423115521 is 125511324.

It is a happy number.

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

It is not a de Polignac number, because 423115521 - 2³ = 423115513 is a prime.

It is a super-2 number, since 2×423115521² = 358053488222202882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423115491 and 423115500.

It is not an unprimeable number, because it can be changed into a prime (423115501) 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, 3065986 + ... + 3066123.

It is an arithmetic number, because the mean of its divisors is an integer number (73585320).

Almost surely, 2^423115521 is an apocalyptic number.

It is an amenable number.

423115521 is a deficient number, since it is larger than the sum of its proper divisors (165567039).

423115521 is a wasteful number, since it uses less digits than its factorization.

423115521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132135.

The product of its digits is 1200, while the sum is 24.

The square root of 423115521 is about 20569.7720210993. The cubic root of 423115521 is about 750.7344041881.

Adding to 423115521 its reverse (125511324), we get a palindrome (548626845).

The spelling of 423115521 in words is "four hundred twenty-three million, one hundred fifteen thousand, five hundred twenty-one".