201961880 has 16 divisors (see below), whose sum is σ = 454414320. Its totient is φ = 80784736.

The previous prime is 201961847. The next prime is 201961889. The reversal of 201961880 is 88169102.

201961880 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 201961880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201961889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2524484 + ... + 2524563.

It is an arithmetic number, because the mean of its divisors is an integer number (28400895).

Almost surely, 2^201961880 is an apocalyptic number.

201961880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201961880 is an abundant number, since it is smaller than the sum of its proper divisors (252452440).

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

201961880 is a wasteful number, since it uses less digits than its factorization.

201961880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5049058 (or 5049054 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 201961880 is about 14211.3292833570. The cubic root of 201961880 is about 586.7095196544.

The spelling of 201961880 in words is "two hundred one million, nine hundred sixty-one thousand, eight hundred eighty".