201081878 has 4 divisors (see below), whose sum is σ = 301622820. Its totient is φ = 100540938.

The previous prime is 201081877. The next prime is 201081913. The reversal of 201081878 is 878180102.

201081878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878180102 = 2 ⋅439090051.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201081877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50270468 + ... + 50270471.

It is an arithmetic number, because the mean of its divisors is an integer number (75405705).

Almost surely, 2^201081878 is an apocalyptic number.

201081878 is a deficient number, since it is larger than the sum of its proper divisors (100540942).

201081878 is a wasteful number, since it uses less digits than its factorization.

201081878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100540941.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 201081878 is about 14180.3341991647. The cubic root of 201081878 is about 585.8561287981.

The spelling of 201081878 in words is "two hundred one million, eighty-one thousand, eight hundred seventy-eight".