201971247 has 4 divisors (see below), whose sum is σ = 269295000. Its totient is φ = 134647496.

The previous prime is 201971243. The next prime is 201971327. The reversal of 201971247 is 742179102.

201971247 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 is a cyclic number.

It is not a de Polignac number, because 201971247 - 2² = 201971243 is a prime.

It is a super-2 number, since 2×201971247² = 81584769229470018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201971243) 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, 33661872 + ... + 33661877.

It is an arithmetic number, because the mean of its divisors is an integer number (67323750).

Almost surely, 2^201971247 is an apocalyptic number.

201971247 is a deficient number, since it is larger than the sum of its proper divisors (67323753).

201971247 is an equidigital number, since it uses as much as digits as its factorization.

201971247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67323752.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 201971247 is about 14211.6588405436. The cubic root of 201971247 is about 586.7185900511.

The spelling of 201971247 in words is "two hundred one million, nine hundred seventy-one thousand, two hundred forty-seven".