201131251 has 4 divisors (see below), whose sum is σ = 209876112. Its totient is φ = 192386392.

The previous prime is 201131219. The next prime is 201131257. The reversal of 201131251 is 152131102.

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 201131251 - 2⁵ = 201131219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201131257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4372396 + ... + 4372441.

It is an arithmetic number, because the mean of its divisors is an integer number (52469028).

Almost surely, 2^201131251 is an apocalyptic number.

201131251 is a deficient number, since it is larger than the sum of its proper divisors (8744861).

201131251 is an equidigital number, since it uses as much as digits as its factorization.

201131251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8744860.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 201131251 is about 14182.0749892250. The cubic root of 201131251 is about 585.9040746197.

Adding to 201131251 its reverse (152131102), we get a palindrome (353262353).

The spelling of 201131251 in words is "two hundred one million, one hundred thirty-one thousand, two hundred fifty-one".