421550023799 has 4 divisors (see below), whose sum is σ = 425417455320. Its totient is φ = 417682592280.

The previous prime is 421550023781. The next prime is 421550023813. The reversal of 421550023799 is 997320055124.

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 421550023799 - 2¹² = 421550019703 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 (421550023709) 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, 1933715597 + ... + 1933715814.

It is an arithmetic number, because the mean of its divisors is an integer number (106354363830).

Almost surely, 2^421550023799 is an apocalyptic number.

421550023799 is a deficient number, since it is larger than the sum of its proper divisors (3867431521).

421550023799 is a wasteful number, since it uses less digits than its factorization.

421550023799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867431520.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 421550023799 in words is "four hundred twenty-one billion, five hundred fifty million, twenty-three thousand, seven hundred ninety-nine".