131222140 has 48 divisors (see below), whose sum is σ = 322628544. Its totient is φ = 43891200.

The previous prime is 131222131. The next prime is 131222141. The reversal of 131222140 is 41222131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222141) 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, 5691 + ... + 17170.

It is an arithmetic number, because the mean of its divisors is an integer number (6721428).

Almost surely, 2^131222140 is an apocalyptic number.

131222140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131222140 is an abundant number, since it is smaller than the sum of its proper divisors (191406404).

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

131222140 is a wasteful number, since it uses less digits than its factorization.

131222140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22918 (or 22916 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 131222140 is about 11455.2232627741. The cubic root of 131222140 is about 508.1622180185.

Adding to 131222140 its reverse (41222131), we get a palindrome (172444271).

Subtracting from 131222140 its reverse (41222131), we obtain a palindrome (90000009).

The spelling of 131222140 in words is "one hundred thirty-one million, two hundred twenty-two thousand, one hundred forty".