131422220 has 48 divisors (see below), whose sum is σ = 284201568. Its totient is φ = 51018240.

The previous prime is 131422219. The next prime is 131422231. The reversal of 131422220 is 22224131.

It is an unprimeable number.

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, 239987 + ... + 240533.

It is an arithmetic number, because the mean of its divisors is an integer number (5920866).

Almost surely, 2^131422220 is an apocalyptic number.

131422220 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 131422220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142100784).

131422220 is an abundant number, since it is smaller than the sum of its proper divisors (152779348).

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

131422220 is a wasteful number, since it uses less digits than its factorization.

131422220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 131422220 is about 11463.9530703855. The cubic root of 131422220 is about 508.4203590740.

Adding to 131422220 its reverse (22224131), we get a palindrome (153646351).

The spelling of 131422220 in words is "one hundred thirty-one million, four hundred twenty-two thousand, two hundred twenty".