423150021 has 64 divisors (see below), whose sum is σ = 752394240. Its totient is φ = 229806720.

The previous prime is 423150001. The next prime is 423150023. The reversal of 423150021 is 120051324.

It is not a de Polignac number, because 423150021 - 2¹⁰ = 423148997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 423149976 and 423150003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423150023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1351761 + ... + 1352073.

It is an arithmetic number, because the mean of its divisors is an integer number (11756160).

Almost surely, 2^423150021 is an apocalyptic number.

It is an amenable number.

423150021 is a deficient number, since it is larger than the sum of its proper divisors (329244219).

423150021 is a wasteful number, since it uses less digits than its factorization.

423150021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 423150021 is about 20570.6106132025. The cubic root of 423150021 is about 750.7548080981.

The spelling of 423150021 in words is "four hundred twenty-three million, one hundred fifty thousand, twenty-one".