421519342391 has 24 divisors (see below), whose sum is σ = 497147517504. Its totient is φ = 356287196160.

The previous prime is 421519342381. The next prime is 421519342421. The reversal of 421519342391 is 193243915124.

It is not a de Polignac number, because 421519342391 - 2³⁴ = 404339473207 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421519342381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36740786 + ... + 36752256.

It is an arithmetic number, because the mean of its divisors is an integer number (20714479896).

Almost surely, 2^421519342391 is an apocalyptic number.

421519342391 is a deficient number, since it is larger than the sum of its proper divisors (75628175113).

421519342391 is a wasteful number, since it uses less digits than its factorization.

421519342391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21831 (or 21824 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The spelling of 421519342391 in words is "four hundred twenty-one billion, five hundred nineteen million, three hundred forty-two thousand, three hundred ninety-one".