131100222 has 64 divisors (see below), whose sum is σ = 293995008. Its totient is φ = 38640000.

The previous prime is 131100199. The next prime is 131100223. The reversal of 131100222 is 222001131.

It is a junction number, because it is equal to n+sod(n) for n = 131100198 and 131100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131100223) 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, 473148 + ... + 473424.

It is an arithmetic number, because the mean of its divisors is an integer number (4593672).

Almost surely, 2^131100222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131100222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146997504).

131100222 is an abundant number, since it is smaller than the sum of its proper divisors (162894786).

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

131100222 is a wasteful number, since it uses less digits than its factorization.

131100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 131100222 is about 11449.9005235853. The cubic root of 131100222 is about 508.0047920477.

Adding to 131100222 its reverse (222001131), we get a palindrome (353101353).

Subtracting 131100222 from its reverse (222001131), we obtain a palindrome (90900909).

The spelling of 131100222 in words is "one hundred thirty-one million, one hundred thousand, two hundred twenty-two".