421052635517 has 4 divisors (see below), whose sum is σ = 421067083836. Its totient is φ = 421038187200.

The previous prime is 421052635501. The next prime is 421052635607. The reversal of 421052635517 is 715536250124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166154879641 + 254897755876 = 407621^2 + 504874^2 .

It is a cyclic number.

It is not a de Polignac number, because 421052635517 - 2⁴ = 421052635501 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 (421052635117) 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, 7180358 + ... + 7238759.

It is an arithmetic number, because the mean of its divisors is an integer number (105266770959).

Almost surely, 2^421052635517 is an apocalyptic number.

It is an amenable number.

421052635517 is a deficient number, since it is larger than the sum of its proper divisors (14448319).

421052635517 is a wasteful number, since it uses less digits than its factorization.

421052635517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448318.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 421052635517 in words is "four hundred twenty-one billion, fifty-two million, six hundred thirty-five thousand, five hundred seventeen".