201122440 has 64 divisors (see below), whose sum is σ = 461102400. Its totient is φ = 78941952.

The previous prime is 201122437. The next prime is 201122489. The reversal of 201122440 is 44221102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710539 + ... + 710821.

It is an arithmetic number, because the mean of its divisors is an integer number (7204725).

Almost surely, 2^201122440 is an apocalyptic number.

201122440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201122440 is an abundant number, since it is smaller than the sum of its proper divisors (259979960).

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

201122440 is a wasteful number, since it uses less digits than its factorization.

201122440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 201122440 is about 14181.7643472172. The cubic root of 201122440 is about 585.8955188861.

Adding to 201122440 its reverse (44221102), we get a palindrome (245343542).

The spelling of 201122440 in words is "two hundred one million, one hundred twenty-two thousand, four hundred forty".