231506542 has 4 divisors (see below), whose sum is σ = 347259816. Its totient is φ = 115753270.

The previous prime is 231506441. The next prime is 231506563. The reversal of 231506542 is 245605132.

231506542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231506542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57876634 + ... + 57876637.

It is an arithmetic number, because the mean of its divisors is an integer number (86814954).

Almost surely, 2^231506542 is an apocalyptic number.

231506542 is a deficient number, since it is larger than the sum of its proper divisors (115753274).

231506542 is a wasteful number, since it uses less digits than its factorization.

231506542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115753273.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 231506542 is about 15215.3390366433. The cubic root of 231506542 is about 614.0274066713.

It can be divided in two parts, 23150 and 6542, that added together give a palindrome (29692).

The spelling of 231506542 in words is "two hundred thirty-one million, five hundred six thousand, five hundred forty-two".