421440330104531 has 4 divisors (see below), whose sum is σ = 422210787746952. Its totient is φ = 420669872462112.

The previous prime is 421440330104449. The next prime is 421440330104561. The reversal of 421440330104531 is 135401033044124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421440330104531 is a prime.

It is a super-2 number, since 2×421440330104531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421440330104491 and 421440330104500.

It is not an unprimeable number, because it can be changed into a prime (421440330104561) 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, 385228820390 + ... + 385228821483.

It is an arithmetic number, because the mean of its divisors is an integer number (105552696936738).

Almost surely, 2^{421440330104531} is an apocalyptic number.

421440330104531 is a deficient number, since it is larger than the sum of its proper divisors (770457642421).

421440330104531 is an equidigital number, since it uses as much as digits as its factorization.

421440330104531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770457642420.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 421440330104531 its reverse (135401033044124), we get a palindrome (556841363148655).

The spelling of 421440330104531 in words is "four hundred twenty-one trillion, four hundred forty billion, three hundred thirty million, one hundred four thousand, five hundred thirty-one".