231242536 has 16 divisors (see below), whose sum is σ = 495519840. Its totient is φ = 99103920.

The previous prime is 231242513. The next prime is 231242537. The reversal of 231242536 is 635242132.

231242536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231242536² = 106946220911422592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (231242537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064610 + ... + 2064721.

It is an arithmetic number, because the mean of its divisors is an integer number (30969990).

Almost surely, 2^231242536 is an apocalyptic number.

It is an amenable number.

231242536 is an abundant number, since it is smaller than the sum of its proper divisors (264277304).

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

231242536 is a wasteful number, since it uses less digits than its factorization.

231242536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129344 (or 4129340 counting only the distinct ones).

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

The square root of 231242536 is about 15206.6609089570. The cubic root of 231242536 is about 613.7939091951.

Adding to 231242536 its reverse (635242132), we get a palindrome (866484668).

The spelling of 231242536 in words is "two hundred thirty-one million, two hundred forty-two thousand, five hundred thirty-six".