231201947 has 4 divisors (see below), whose sum is σ = 231295200. Its totient is φ = 231108696.

The previous prime is 231201941. The next prime is 231201961. The reversal of 231201947 is 749102132.

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

It is a cyclic number.

It is not a de Polignac number, because 231201947 - 2¹⁰ = 231200923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231201941) 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, 42803 + ... + 47900.

It is an arithmetic number, because the mean of its divisors is an integer number (57823800).

Almost surely, 2^231201947 is an apocalyptic number.

231201947 is a deficient number, since it is larger than the sum of its proper divisors (93253).

231201947 is an equidigital number, since it uses as much as digits as its factorization.

231201947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93252.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 231201947 is about 15205.3262707513. The cubic root of 231201947 is about 613.7579948989.

The spelling of 231201947 in words is "two hundred thirty-one million, two hundred one thousand, nine hundred forty-seven".