231402012 has 48 divisors (see below), whose sum is σ = 552048000. Its totient is φ = 75418560.

The previous prime is 231401999. The next prime is 231402013. The reversal of 231402012 is 210204132.

It is a junction number, because it is equal to n+sod(n) for n = 231401982 and 231402000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231402013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148614 + ... + 150162.

It is an arithmetic number, because the mean of its divisors is an integer number (11501000).

Almost surely, 2^231402012 is an apocalyptic number.

It is an amenable number.

231402012 is an abundant number, since it is smaller than the sum of its proper divisors (320645988).

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

231402012 is a wasteful number, since it uses less digits than its factorization.

231402012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826 (or 1824 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 231402012 is about 15211.9036284089. The cubic root of 231402012 is about 613.9349773936.

Adding to 231402012 its reverse (210204132), we get a palindrome (441606144).

It can be divided in two parts, 23140 and 2012, that added together give a palindrome (25152).

The spelling of 231402012 in words is "two hundred thirty-one million, four hundred two thousand, twelve".