231242356 has 6 divisors (see below), whose sum is σ = 404674130. Its totient is φ = 115621176.

The previous prime is 231242309. The next prime is 231242357. The reversal of 231242356 is 653242132.

231242356 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 143520400 + 87721956 = 11980^2 + 9366^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231242357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28905291 + ... + 28905298.

Almost surely, 2^231242356 is an apocalyptic number.

It is an amenable number.

231242356 is a deficient number, since it is larger than the sum of its proper divisors (173431774).

231242356 is a wasteful number, since it uses less digits than its factorization.

231242356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57810593 (or 57810591 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 231242356 is about 15206.6549904968. The cubic root of 231242356 is about 613.7937499353.

Adding to 231242356 its reverse (653242132), we get a palindrome (884484488).

The spelling of 231242356 in words is "two hundred thirty-one million, two hundred forty-two thousand, three hundred fifty-six".