231861541 has 8 divisors (see below), whose sum is σ = 244637120. Its totient is φ = 219143232.

The previous prime is 231861533. The next prime is 231861571. The reversal of 231861541 is 145168132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231861541 - 2³ = 231861533 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 (231861571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5865 + ... + 22318.

It is an arithmetic number, because the mean of its divisors is an integer number (30579640).

Almost surely, 2^231861541 is an apocalyptic number.

It is an amenable number.

231861541 is a deficient number, since it is larger than the sum of its proper divisors (12775579).

231861541 is a wasteful number, since it uses less digits than its factorization.

231861541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28635.

The product of its digits is 5760, while the sum is 31.

The square root of 231861541 is about 15227.0003940369. Note that the first 3 decimals coincide. The cubic root of 231861541 is about 614.3411023301.

The spelling of 231861541 in words is "two hundred thirty-one million, eight hundred sixty-one thousand, five hundred forty-one".