231642612 has 96 divisors (see below), whose sum is σ = 645200640. Its totient is φ = 71608320.

The previous prime is 231642611. The next prime is 231642617. The reversal of 231642612 is 216246132.

231642612 is a `hidden beast` number, since 2 + 3 + 1 + 6 + 42 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231642611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129468 + ... + 131244.

It is an arithmetic number, because the mean of its divisors is an integer number (6720840).

Almost surely, 2^231642612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231642612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322600320).

231642612 is an abundant number, since it is smaller than the sum of its proper divisors (413558028).

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

231642612 is a wasteful number, since it uses less digits than its factorization.

231642612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878 (or 1870 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 231642612 is about 15219.8098542656. The cubic root of 231642612 is about 614.1476831073.

Adding to 231642612 its reverse (216246132), we get a palindrome (447888744).

The spelling of 231642612 in words is "two hundred thirty-one million, six hundred forty-two thousand, six hundred twelve".