131662220 has 12 divisors (see below), whose sum is σ = 276490704. Its totient is φ = 52664880.

The previous prime is 131662213. The next prime is 131662231. The reversal of 131662220 is 22266131.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3291536 + ... + 3291575.

It is an arithmetic number, because the mean of its divisors is an integer number (23040892).

Almost surely, 2^131662220 is an apocalyptic number.

131662220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131662220 is an abundant number, since it is smaller than the sum of its proper divisors (144828484).

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

131662220 is a wasteful number, since it uses less digits than its factorization.

131662220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6583120 (or 6583118 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 131662220 is about 11474.4158892730. The cubic root of 131662220 is about 508.7296590901.

It can be divided in two parts, 1316 and 62220, that added together give a palindrome (63536).

The spelling of 131662220 in words is "one hundred thirty-one million, six hundred sixty-two thousand, two hundred twenty".