201171378 has 16 divisors (see below), whose sum is σ = 403188480. Its totient is φ = 66916176.

The previous prime is 201171371. The next prime is 201171389. The reversal of 201171378 is 873171102.

It is not an unprimeable number, because it can be changed into a prime (201171371) 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 7 ways as a sum of consecutive naturals, for example, 32125 + ... + 37872.

It is an arithmetic number, because the mean of its divisors is an integer number (25199280).

Almost surely, 2^201171378 is an apocalyptic number.

201171378 is an abundant number, since it is smaller than the sum of its proper divisors (202017102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201171378 is a wasteful number, since it uses less digits than its factorization.

201171378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70481.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 201171378 is about 14183.4896270276. The cubic root of 201171378 is about 585.9430359271.

The spelling of 201171378 in words is "two hundred one million, one hundred seventy-one thousand, three hundred seventy-eight".