201522550 has 72 divisors (see below), whose sum is σ = 413489160. Its totient is φ = 72864000.

The previous prime is 201522523. The next prime is 201522551. The reversal of 201522550 is 55225102.

It is a super-2 number, since 2×201522550² = 81222676317005000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201522551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 502350 + ... + 502750.

It is an arithmetic number, because the mean of its divisors is an integer number (5742905).

Almost surely, 2^201522550 is an apocalyptic number.

201522550 is an abundant number, since it is smaller than the sum of its proper divisors (211966610).

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

201522550 is a wasteful number, since it uses less digits than its factorization.

201522550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 201522550 is about 14195.8638342300. The cubic root of 201522550 is about 586.2837854819.

Adding to 201522550 its reverse (55225102), we get a palindrome (256747652).

The spelling of 201522550 in words is "two hundred one million, five hundred twenty-two thousand, five hundred fifty".