201251813 has 4 divisors (see below), whose sum is σ = 230002080. Its totient is φ = 172501548.

The previous prime is 201251807. The next prime is 201251849. The reversal of 201251813 is 318152102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201251813 - 2¹⁶ = 201186277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201253813) 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, 14375123 + ... + 14375136.

It is an arithmetic number, because the mean of its divisors is an integer number (57500520).

Almost surely, 2^201251813 is an apocalyptic number.

It is an amenable number.

201251813 is a deficient number, since it is larger than the sum of its proper divisors (28750267).

201251813 is an equidigital number, since it uses as much as digits as its factorization.

201251813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28750266.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 201251813 is about 14186.3248588209. The cubic root of 201251813 is about 586.0211186851.

The spelling of 201251813 in words is "two hundred one million, two hundred fifty-one thousand, eight hundred thirteen".