131422140 has 72 divisors (see below), whose sum is σ = 401856000. Its totient is φ = 34763904.

The previous prime is 131422133. The next prime is 131422157. The reversal of 131422140 is 41224131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19986 + ... + 25734.

Almost surely, 2^131422140 is an apocalyptic number.

131422140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131422140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200928000).

131422140 is an abundant number, since it is smaller than the sum of its proper divisors (270433860).

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

131422140 is a wasteful number, since it uses less digits than its factorization.

131422140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891 (or 5886 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 131422140 is about 11463.9495811871. The cubic root of 131422140 is about 508.4202559113.

Adding to 131422140 its reverse (41224131), we get a palindrome (172646271).

The spelling of 131422140 in words is "one hundred thirty-one million, four hundred twenty-two thousand, one hundred forty".