201170556 has 72 divisors (see below), whose sum is σ = 537264000. Its totient is φ = 63292320.

The previous prime is 201170549. The next prime is 201170561. The reversal of 201170556 is 655071102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335545 + ... + 336143.

It is an arithmetic number, because the mean of its divisors is an integer number (7462000).

Almost surely, 2^201170556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201170556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268632000).

201170556 is an abundant number, since it is smaller than the sum of its proper divisors (336093444).

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

201170556 is a wasteful number, since it uses less digits than its factorization.

201170556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 201170556 is about 14183.4606496440. The cubic root of 201170556 is about 585.9422378582.

The spelling of 201170556 in words is "two hundred one million, one hundred seventy thousand, five hundred fifty-six".