431143320402 has 20 divisors (see below), whose sum is σ = 966080403486. Its totient is φ = 143714440080.

The previous prime is 431143320397. The next prime is 431143320407. The reversal of 431143320402 is 204023341134.

It is an interprime number because it is at equal distance from previous prime (431143320397) and next prime (431143320407).

It can be written as a sum of positive squares in only one way, i.e., 418610294001 + 12533026401 = 647001^2 + 111951^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (431143320407) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1330689099 + ... + 1330689422.

Almost surely, 2^431143320402 is an apocalyptic number.

431143320402 is an abundant number, since it is smaller than the sum of its proper divisors (534937083084).

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

431143320402 is a wasteful number, since it uses less digits than its factorization.

431143320402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661378535 (or 2661378526 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 431143320402 its reverse (204023341134), we get a palindrome (635166661536).

The spelling of 431143320402 in words is "four hundred thirty-one billion, one hundred forty-three million, three hundred twenty thousand, four hundred two".