202111380 has 36 divisors (see below), whose sum is σ = 613071732. Its totient is φ = 53896320.

The previous prime is 202111363. The next prime is 202111381. The reversal of 202111380 is 83111202.

202111380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35856144 + 166255236 = 5988^2 + 12894^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202111381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561241 + ... + 561600.

Almost surely, 2^202111380 is an apocalyptic number.

202111380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202111380 is an abundant number, since it is smaller than the sum of its proper divisors (410960352).

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

202111380 is a wasteful number, since it uses less digits than its factorization.

202111380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122856 (or 1122851 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 202111380 is about 14216.5881982985. The cubic root of 202111380 is about 586.8542523126.

Adding to 202111380 its reverse (83111202), we get a palindrome (285222582).

The spelling of 202111380 in words is "two hundred two million, one hundred eleven thousand, three hundred eighty".