421755310572 has 96 divisors (see below), whose sum is σ = 1080259939584. Its totient is φ = 127532697600.

The previous prime is 421755310541. The next prime is 421755310573. The reversal of 421755310572 is 275013557124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (421755310573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390447 + ... + 997977.

It is an arithmetic number, because the mean of its divisors is an integer number (11252707704).

Almost surely, 2^421755310572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421755310572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540129969792).

421755310572 is an abundant number, since it is smaller than the sum of its proper divisors (658504629012).

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

421755310572 is a wasteful number, since it uses less digits than its factorization.

421755310572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607679 (or 607677 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 42.

Adding to 421755310572 its reverse (275013557124), we get a palindrome (696768867696).

The spelling of 421755310572 in words is "four hundred twenty-one billion, seven hundred fifty-five million, three hundred ten thousand, five hundred seventy-two".