423545531021 has 8 divisors (see below), whose sum is σ = 439648241664. Its totient is φ = 407738283120.

The previous prime is 423545530997. The next prime is 423545531023. The reversal of 423545531021 is 120135545324.

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 423545531021 - 2⁶ = 423545530957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423545531023) 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, 73862765 + ... + 73868498.

It is an arithmetic number, because the mean of its divisors is an integer number (54956030208).

Almost surely, 2^423545531021 is an apocalyptic number.

It is an amenable number.

423545531021 is a deficient number, since it is larger than the sum of its proper divisors (16102710643).

423545531021 is a wasteful number, since it uses less digits than its factorization.

423545531021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147731371.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 423545531021 in words is "four hundred twenty-three billion, five hundred forty-five million, five hundred thirty-one thousand, twenty-one".