431323313440 has 24 divisors (see below), whose sum is σ = 1019001328380. Its totient is φ = 172529325312.

The previous prime is 431323313423. The next prime is 431323313479. The reversal of 431323313440 is 44313323134.

It can be written as a sum of positive squares in 2 ways, for example, as 416195297424 + 15128016016 = 645132^2 + 122996^2 .

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, 1347885195 + ... + 1347885514.

Almost surely, 2^431323313440 is an apocalyptic number.

431323313440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

431323313440 is an abundant number, since it is smaller than the sum of its proper divisors (587678014940).

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

431323313440 is a wasteful number, since it uses less digits than its factorization.

431323313440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695770724 (or 2695770716 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 431323313440 its reverse (44313323134), we get a palindrome (475636636574).

The spelling of 431323313440 in words is "four hundred thirty-one billion, three hundred twenty-three million, three hundred thirteen thousand, four hundred forty".