131212230 has 32 divisors (see below), whose sum is σ = 315304704. Its totient is φ = 34946016.

The previous prime is 131212223. The next prime is 131212253. The reversal of 131212230 is 32212131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26749 + ... + 31271.

It is an arithmetic number, because the mean of its divisors is an integer number (9853272).

Almost surely, 2^131212230 is an apocalyptic number.

131212230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131212230 is an abundant number, since it is smaller than the sum of its proper divisors (184092474).

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

131212230 is a wasteful number, since it uses less digits than its factorization.

131212230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131212230 is about 11454.7907008378. The cubic root of 131212230 is about 508.1494254253.

Adding to 131212230 its reverse (32212131), we get a palindrome (163424361).

Subtracting from 131212230 its reverse (32212131), we obtain a palindrome (99000099).

It can be divided in two parts, 13121 and 2230, that added together give a palindrome (15351).

The spelling of 131212230 in words is "one hundred thirty-one million, two hundred twelve thousand, two hundred thirty".