131140321 has 16 divisors (see below), whose sum is σ = 146508544. Its totient is φ = 116593344.

The previous prime is 131140309. The next prime is 131140333. The reversal of 131140321 is 123041131.

It is an interprime number because it is at equal distance from previous prime (131140309) and next prime (131140333).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131140321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131140295 and 131140304.

It is not an unprimeable number, because it can be changed into a prime (131141321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48220 + ... + 50866.

It is an arithmetic number, because the mean of its divisors is an integer number (9156784).

Almost surely, 2^131140321 is an apocalyptic number.

It is an amenable number.

131140321 is a deficient number, since it is larger than the sum of its proper divisors (15368223).

131140321 is a wasteful number, since it uses less digits than its factorization.

131140321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 131140321 is about 11451.6514529565. The cubic root of 131140321 is about 508.0565804361.

Adding to 131140321 its reverse (123041131), we get a palindrome (254181452).

The spelling of 131140321 in words is "one hundred thirty-one million, one hundred forty thousand, three hundred twenty-one".