201971151 has 24 divisors (see below), whose sum is σ = 303756544. Its totient is φ = 134106840.

The previous prime is 201971149. The next prime is 201971221. The reversal of 201971151 is 151179102.

It is not a de Polignac number, because 201971151 - 2¹ = 201971149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201971141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64320 + ... + 67386.

Almost surely, 2^201971151 is an apocalyptic number.

201971151 is a deficient number, since it is larger than the sum of its proper divisors (101785393).

201971151 is an equidigital number, since it uses as much as digits as its factorization.

201971151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353 (or 3341 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 27.

The square root of 201971151 is about 14211.6554630346. The cubic root of 201971151 is about 586.7184970923.

The spelling of 201971151 in words is "two hundred one million, nine hundred seventy-one thousand, one hundred fifty-one".