423545521 has 8 divisors (see below), whose sum is σ = 484362560. Its totient is φ = 362806128.

The previous prime is 423545519. The next prime is 423545527. The reversal of 423545521 is 125545324.

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

It is a cyclic number.

It is not a de Polignac number, because 423545521 - 2¹ = 423545519 is a prime.

It is a super-2 number, since 2×423545521² = 358781616718322882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423545527) 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, 7206 + ... + 29983.

It is an arithmetic number, because the mean of its divisors is an integer number (60545320).

Almost surely, 2^423545521 is an apocalyptic number.

It is an amenable number.

423545521 is a deficient number, since it is larger than the sum of its proper divisors (60817039).

423545521 is a wasteful number, since it uses less digits than its factorization.

423545521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38823.

The product of its digits is 24000, while the sum is 31.

The square root of 423545521 is about 20580.2215974464. The cubic root of 423545521 is about 750.9886345999.

The spelling of 423545521 in words is "four hundred twenty-three million, five hundred forty-five thousand, five hundred twenty-one".