131233433320420 has 48 divisors (see below), whose sum is σ = 275671843639920. Its totient is φ = 52477825716224.

The previous prime is 131233433320417. The next prime is 131233433320421. The reversal of 131233433320420 is 24023334332131.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1102285810404 + 130131147510016 = 1049898^2 + 11407504^2 .

It is not an unprimeable number, because it can be changed into a prime (131233433320421) 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, 1630411536 + ... + 1630492024.

It is an arithmetic number, because the mean of its divisors is an integer number (5743163409165).

Almost surely, 2^{131233433320420} is an apocalyptic number.

131233433320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131233433320420 is an abundant number, since it is smaller than the sum of its proper divisors (144438410319500).

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

131233433320420 is a wasteful number, since it uses less digits than its factorization.

131233433320420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103632 (or 103630 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 34.

Adding to 131233433320420 its reverse (24023334332131), we get a palindrome (155256767652551).

The spelling of 131233433320420 in words is "one hundred thirty-one trillion, two hundred thirty-three billion, four hundred thirty-three million, three hundred twenty thousand, four hundred twenty".