421400234520524 has 48 divisors (see below), whose sum is σ = 851498006103360. Its totient is φ = 178740103956480.

The previous prime is 421400234520509. The next prime is 421400234520539. The reversal of 421400234520524 is 425025432004124.

It is an interprime number because it is at equal distance from previous prime (421400234520509) and next prime (421400234520539).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75672977 + ... + 81050600.

It is an arithmetic number, because the mean of its divisors is an integer number (17739541793820).

Almost surely, 2^{421400234520524} is an apocalyptic number.

It is an amenable number.

421400234520524 is an abundant number, since it is smaller than the sum of its proper divisors (430097771582836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421400234520524 is a wasteful number, since it uses less digits than its factorization.

421400234520524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156724578 (or 156724576 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 421400234520524 its reverse (425025432004124), we get a palindrome (846425666524648).

The spelling of 421400234520524 in words is "four hundred twenty-one trillion, four hundred billion, two hundred thirty-four million, five hundred twenty thousand, five hundred twenty-four".