131212332 has 96 divisors (see below), whose sum is σ = 359170560. Its totient is φ = 41342400.

The previous prime is 131212321. The next prime is 131212343. The reversal of 131212332 is 233212131.

It is an interprime number because it is at equal distance from previous prime (131212321) and next prime (131212343).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250623 + ... + 251145.

It is an arithmetic number, because the mean of its divisors is an integer number (3741360).

Almost surely, 2^131212332 is an apocalyptic number.

131212332 is a gapful number since it is divisible by the number (12) 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 131212332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179585280).

131212332 is an abundant number, since it is smaller than the sum of its proper divisors (227958228).

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

131212332 is a wasteful number, since it uses less digits than its factorization.

131212332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 652 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131212332 is about 11454.7951531226. The cubic root of 131212332 is about 508.1495570980.

Adding to 131212332 its reverse (233212131), we get a palindrome (364424463).

The spelling of 131212332 in words is "one hundred thirty-one million, two hundred twelve thousand, three hundred thirty-two".