231273972 has 18 divisors (see below), whose sum is σ = 584609298. Its totient is φ = 77091312.

The previous prime is 231273971. The next prime is 231273979. The reversal of 231273972 is 279372132.

It can be written as a sum of positive squares in only one way, i.e., 220344336 + 10929636 = 14844^2 + 3306^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6424277 = 231273972 / (2 + 3 + 1 + 2 + 7 + 3 + 9 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231273971) 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 5 ways as a sum of consecutive naturals, for example, 3212103 + ... + 3212174.

Almost surely, 2^231273972 is an apocalyptic number.

It is an amenable number.

231273972 is an abundant number, since it is smaller than the sum of its proper divisors (353335326).

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

231273972 is a wasteful number, since it uses less digits than its factorization.

231273972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424287 (or 6424282 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 231273972 is about 15207.6944998248. The cubic root of 231273972 is about 613.8217217699.

The spelling of 231273972 in words is "two hundred thirty-one million, two hundred seventy-three thousand, nine hundred seventy-two".