131022340 has 12 divisors (see below), whose sum is σ = 275146956. Its totient is φ = 52408928.

The previous prime is 131022313. The next prime is 131022341. The reversal of 131022340 is 43220131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 81432576 + 49589764 = 9024^2 + 7042^2 .

It is not an unprimeable number, because it can be changed into a prime (131022341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3275539 + ... + 3275578.

It is an arithmetic number, because the mean of its divisors is an integer number (22928913).

Almost surely, 2^131022340 is an apocalyptic number.

131022340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131022340 is an abundant number, since it is smaller than the sum of its proper divisors (144124616).

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

131022340 is a wasteful number, since it uses less digits than its factorization.

131022340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6551126 (or 6551124 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131022340 is about 11446.4990280871. The cubic root of 131022340 is about 507.9041762343.

Adding to 131022340 its reverse (43220131), we get a palindrome (174242471).

The spelling of 131022340 in words is "one hundred thirty-one million, twenty-two thousand, three hundred forty".