421525532567 has 4 divisors (see below), whose sum is σ = 424743284856. Its totient is φ = 418307780280.

The previous prime is 421525532521. The next prime is 421525532579. The reversal of 421525532567 is 765235525124.

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 421525532567 - 2¹² = 421525528471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421525232567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608875948 + ... + 1608876209.

It is an arithmetic number, because the mean of its divisors is an integer number (106185821214).

Almost surely, 2^421525532567 is an apocalyptic number.

421525532567 is a deficient number, since it is larger than the sum of its proper divisors (3217752289).

421525532567 is a wasteful number, since it uses less digits than its factorization.

421525532567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217752288.

The product of its digits is 2520000, while the sum is 47.

The spelling of 421525532567 in words is "four hundred twenty-one billion, five hundred twenty-five million, five hundred thirty-two thousand, five hundred sixty-seven".