201855879 has 6 divisors (see below), whose sum is σ = 291569616. Its totient is φ = 134570580.

The previous prime is 201855859. The next prime is 201855887. The reversal of 201855879 is 978558102.

It is a happy number.

201855879 is a `hidden beast` number, since 20 + 1 + 8 + 558 + 79 = 666.

It is not a de Polignac number, because 201855879 - 2⁸ = 201855623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201855859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11214207 + ... + 11214224.

It is an arithmetic number, because the mean of its divisors is an integer number (48594936).

Almost surely, 2^201855879 is an apocalyptic number.

201855879 is a deficient number, since it is larger than the sum of its proper divisors (89713737).

201855879 is a wasteful number, since it uses less digits than its factorization.

201855879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22428437 (or 22428434 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 201855879 is about 14207.5993397900. The cubic root of 201855879 is about 586.6068555946.

The spelling of 201855879 in words is "two hundred one million, eight hundred fifty-five thousand, eight hundred seventy-nine".