131420220 has 24 divisors (see below), whose sum is σ = 367976784. Its totient is φ = 35045376.

The previous prime is 131420173. The next prime is 131420269. The reversal of 131420220 is 22024131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131420220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095109 + ... + 1095228.

It is an arithmetic number, because the mean of its divisors is an integer number (15332366).

Almost surely, 2^131420220 is an apocalyptic number.

131420220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131420220 is an abundant number, since it is smaller than the sum of its proper divisors (236556564).

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

131420220 is a wasteful number, since it uses less digits than its factorization.

131420220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190349 (or 2190347 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 131420220 is about 11463.8658401082. The cubic root of 131420220 is about 508.4177799925.

Adding to 131420220 its reverse (22024131), we get a palindrome (153444351).

The spelling of 131420220 in words is "one hundred thirty-one million, four hundred twenty thousand, two hundred twenty".