420440131334431 has 16 divisors (see below), whose sum is σ = 452853031034880. Its totient is φ = 388037429076960.

The previous prime is 420440131334423. The next prime is 420440131334477. The reversal of 420440131334431 is 134433131044024.

It is not a de Polignac number, because 420440131334431 - 2³ = 420440131334423 is a prime.

It is a super-2 number, since 2×420440131334431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420440131334401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2761780086 + ... + 2761932316.

It is an arithmetic number, because the mean of its divisors is an integer number (28303314439680).

Almost surely, 2^{420440131334431} is an apocalyptic number.

420440131334431 is a deficient number, since it is larger than the sum of its proper divisors (32412899700449).

420440131334431 is a wasteful number, since it uses less digits than its factorization.

420440131334431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184326.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 420440131334431 its reverse (134433131044024), we get a palindrome (554873262378455).

The spelling of 420440131334431 in words is "four hundred twenty trillion, four hundred forty billion, one hundred thirty-one million, three hundred thirty-four thousand, four hundred thirty-one".