201029556 has 216 divisors, whose sum is σ = 629227200. Its totient is φ = 49900032.

The previous prime is 201029533. The next prime is 201029561. The reversal of 201029556 is 655920102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11825260 + ... + 11825276.

Almost surely, 2^201029556 is an apocalyptic number.

201029556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201029556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314613600).

201029556 is an abundant number, since it is smaller than the sum of its proper divisors (428197644).

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

201029556 is a wasteful number, since it uses less digits than its factorization.

201029556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 201029556 is about 14178.4892001934. The cubic root of 201029556 is about 585.8053106542.

Adding to 201029556 its reverse (655920102), we get a palindrome (856949658).

The spelling of 201029556 in words is "two hundred one million, twenty-nine thousand, five hundred fifty-six".