231487541 has 4 divisors (see below), whose sum is σ = 239469900. Its totient is φ = 223505184.

The previous prime is 231487537. The next prime is 231487561. The reversal of 231487541 is 145784132.

231487541 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 can be written as a sum of positive squares in 2 ways, for example, as 189172516 + 42315025 = 13754^2 + 6505^2 .

It is a cyclic number.

It is not a de Polignac number, because 231487541 - 2² = 231487537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231487561) 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, 3991136 + ... + 3991193.

It is an arithmetic number, because the mean of its divisors is an integer number (59867475).

Almost surely, 2^231487541 is an apocalyptic number.

It is an amenable number.

231487541 is a deficient number, since it is larger than the sum of its proper divisors (7982359).

231487541 is an equidigital number, since it uses as much as digits as its factorization.

231487541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7982358.

The product of its digits is 26880, while the sum is 35.

The square root of 231487541 is about 15214.7146210502. The cubic root of 231487541 is about 614.0106073564.

The spelling of 231487541 in words is "two hundred thirty-one million, four hundred eighty-seven thousand, five hundred forty-one".