423521235247 has 4 divisors (see below), whose sum is σ = 462023165736. Its totient is φ = 385019304760.

The previous prime is 423521235223. The next prime is 423521235253. The reversal of 423521235247 is 742532125324.

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 423521235247 - 2⁷ = 423521235119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423521235287) 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, 19250965228 + ... + 19250965249.

It is an arithmetic number, because the mean of its divisors is an integer number (115505791434).

Almost surely, 2^423521235247 is an apocalyptic number.

423521235247 is a deficient number, since it is larger than the sum of its proper divisors (38501930489).

423521235247 is a wasteful number, since it uses less digits than its factorization.

423521235247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38501930488.

The product of its digits is 403200, while the sum is 40.

The spelling of 423521235247 in words is "four hundred twenty-three billion, five hundred twenty-one million, two hundred thirty-five thousand, two hundred forty-seven".