420132431521 has 16 divisors (see below), whose sum is σ = 461183321088. Its totient is φ = 379558834000.

The previous prime is 420132431519. The next prime is 420132431533. The reversal of 420132431521 is 125134231024.

It is a cyclic number.

It is not a de Polignac number, because 420132431521 - 2¹ = 420132431519 is a prime.

It is a super-2 number, since 2×420132431521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420132431521.

It is not an unprimeable number, because it can be changed into a prime (420132435521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8150796 + ... + 8202178.

It is an arithmetic number, because the mean of its divisors is an integer number (28823957568).

Almost surely, 2^420132431521 is an apocalyptic number.

It is an amenable number.

420132431521 is a deficient number, since it is larger than the sum of its proper divisors (41050889567).

420132431521 is a wasteful number, since it uses less digits than its factorization.

420132431521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56012.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 420132431521 its reverse (125134231024), we get a palindrome (545266662545).

The spelling of 420132431521 in words is "four hundred twenty billion, one hundred thirty-two million, four hundred thirty-one thousand, five hundred twenty-one".