331320136 has 32 divisors (see below), whose sum is σ = 719706240. Its totient is φ = 140047488.

The previous prime is 331320131. The next prime is 331320137. The reversal of 331320136 is 631023133.

331320136 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (331320131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36436 + ... + 44611.

It is an arithmetic number, because the mean of its divisors is an integer number (22490820).

Almost surely, 2^331320136 is an apocalyptic number.

It is an amenable number.

331320136 is an abundant number, since it is smaller than the sum of its proper divisors (388386104).

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

331320136 is a wasteful number, since it uses less digits than its factorization.

331320136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81133 (or 81129 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 331320136 is about 18202.2014053246. The cubic root of 331320136 is about 691.9625816470.

Adding to 331320136 its reverse (631023133), we get a palindrome (962343269).

The spelling of 331320136 in words is "three hundred thirty-one million, three hundred twenty thousand, one hundred thirty-six".