431430240315220 has 12 divisors (see below), whose sum is σ = 906003504662004. Its totient is φ = 172572096126080.

The previous prime is 431430240315167. The next prime is 431430240315247. The reversal of 431430240315220 is 22513042034134.

It can be written as a sum of positive squares in 2 ways, for example, as 296534048186896 + 134896192128324 = 17220164^2 + 11614482^2 .

It is a super-2 number, since 2×431430240315220² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10785756007861 + ... + 10785756007900.

It is an arithmetic number, because the mean of its divisors is an integer number (75500292055167).

Almost surely, 2^{431430240315220} is an apocalyptic number.

It is an amenable number.

431430240315220 is an abundant number, since it is smaller than the sum of its proper divisors (474573264346784).

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

431430240315220 is a wasteful number, since it uses less digits than its factorization.

431430240315220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21571512015770 (or 21571512015768 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 431430240315220 its reverse (22513042034134), we get a palindrome (453943282349354).

The spelling of 431430240315220 in words is "four hundred thirty-one trillion, four hundred thirty billion, two hundred forty million, three hundred fifteen thousand, two hundred twenty".