131302220 has 96 divisors (see below), whose sum is σ = 341687808. Its totient is φ = 41352192.

The previous prime is 131302211. The next prime is 131302229. The reversal of 131302220 is 22203131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131302211) and next prime (131302229).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 131302195 and 131302204.

It is not an unprimeable number, because it can be changed into a prime (131302229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101699 + ... + 102981.

It is an arithmetic number, because the mean of its divisors is an integer number (3559248).

Almost surely, 2^131302220 is an apocalyptic number.

131302220 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 131302220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170843904).

131302220 is an abundant number, since it is smaller than the sum of its proper divisors (210385588).

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

131302220 is a wasteful number, since it uses less digits than its factorization.

131302220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 131302220 is about 11458.7180783890. The cubic root of 131302220 is about 508.2655678426.

Adding to 131302220 its reverse (22203131), we get a palindrome (153505351).

The spelling of 131302220 in words is "one hundred thirty-one million, three hundred two thousand, two hundred twenty".