201153656 has 128 divisors (see below), whose sum is σ = 461894400. Its totient is φ = 81070080.

The previous prime is 201153647. The next prime is 201153683. The reversal of 201153656 is 656351102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3409355 + ... + 3409413.

It is an arithmetic number, because the mean of its divisors is an integer number (3608550).

Almost surely, 2^201153656 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 201153656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230947200).

201153656 is an abundant number, since it is smaller than the sum of its proper divisors (260740744).

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

201153656 is a wasteful number, since it uses less digits than its factorization.

201153656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 201153656 is about 14182.8648727963. The cubic root of 201153656 is about 585.9258293915.

The spelling of 201153656 in words is "two hundred one million, one hundred fifty-three thousand, six hundred fifty-six".