131235336420 has 48 divisors (see below), whose sum is σ = 372634432128. Its totient is φ = 34503185920.

The previous prime is 131235336389. The next prime is 131235336437. The reversal of 131235336420 is 24633532131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15398949 + ... + 15407468.

It is an arithmetic number, because the mean of its divisors is an integer number (7763217336).

Almost surely, 2^131235336420 is an apocalyptic number.

131235336420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131235336420 is an abundant number, since it is smaller than the sum of its proper divisors (241399095708).

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

131235336420 is a wasteful number, since it uses less digits than its factorization.

131235336420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30806500 (or 30806498 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 131235336420 its reverse (24633532131), we get a palindrome (155868868551).

The spelling of 131235336420 in words is "one hundred thirty-one billion, two hundred thirty-five million, three hundred thirty-six thousand, four hundred twenty".