195047231 has 4 divisors (see below), whose sum is σ = 195682872. Its totient is φ = 194411592.

The previous prime is 195047207. The next prime is 195047299. The reversal of 195047231 is 132740591.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195047231 is a prime.

It is a super-2 number, since 2×195047231² = 76086844641534722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195040231) 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, 317360 + ... + 317973.

It is an arithmetic number, because the mean of its divisors is an integer number (48920718).

Almost surely, 2^195047231 is an apocalyptic number.

195047231 is a deficient number, since it is larger than the sum of its proper divisors (635641).

195047231 is an equidigital number, since it uses as much as digits as its factorization.

195047231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635640.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 195047231 is about 13965.9310824592. The cubic root of 195047231 is about 579.9358143399.

The spelling of 195047231 in words is "one hundred ninety-five million, forty-seven thousand, two hundred thirty-one".