71720201 has 16 divisors (see below), whose sum is σ = 84185088. Its totient is φ = 59832000.

The previous prime is 71720189. The next prime is 71720213. The reversal of 71720201 is 10202717.

It is an interprime number because it is at equal distance from previous prime (71720189) and next prime (71720213).

It is a cyclic number.

It is not a de Polignac number, because 71720201 - 2⁶ = 71720137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71720221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42296 + ... + 43958.

It is an arithmetic number, because the mean of its divisors is an integer number (5261568).

Almost surely, 2^71720201 is an apocalyptic number.

It is an amenable number.

71720201 is a deficient number, since it is larger than the sum of its proper divisors (12464887).

71720201 is a wasteful number, since it uses less digits than its factorization.

71720201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 71720201 is about 8468.7780110238. The cubic root of 71720201 is about 415.4771711703.

Adding to 71720201 its reverse (10202717), we get a palindrome (81922918).

The spelling of 71720201 in words is "seventy-one million, seven hundred twenty thousand, two hundred one".