231975145 has 8 divisors (see below), whose sum is σ = 278944704. Its totient is φ = 185197104.

The previous prime is 231975143. The next prime is 231975151. The reversal of 231975145 is 541579132.

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 231975145 - 2¹ = 231975143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231975143) 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, 45199 + ... + 50068.

It is an arithmetic number, because the mean of its divisors is an integer number (34868088).

Almost surely, 2^231975145 is an apocalyptic number.

It is an amenable number.

231975145 is a deficient number, since it is larger than the sum of its proper divisors (46969559).

231975145 is an equidigital number, since it uses as much as digits as its factorization.

231975145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95759.

The product of its digits is 37800, while the sum is 37.

The square root of 231975145 is about 15230.7302845267. The cubic root of 231975145 is about 614.4414211251.

The spelling of 231975145 in words is "two hundred thirty-one million, nine hundred seventy-five thousand, one hundred forty-five".