201651534 has 96 divisors (see below), whose sum is σ = 525657600. Its totient is φ = 54622656.

The previous prime is 201651509. The next prime is 201651547. The reversal of 201651534 is 435156102.

201651534 is a `hidden beast` number, since 2 + 0 + 1 + 651 + 5 + 3 + 4 = 666.

201651534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 201651498 and 201651507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 431569 + ... + 432035.

It is an arithmetic number, because the mean of its divisors is an integer number (5475600).

Almost surely, 2^201651534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201651534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262828800).

201651534 is an abundant number, since it is smaller than the sum of its proper divisors (324006066).

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

201651534 is a wasteful number, since it uses less digits than its factorization.

201651534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 201651534 is about 14200.4061209530. The cubic root of 201651534 is about 586.4088419579.

The spelling of 201651534 in words is "two hundred one million, six hundred fifty-one thousand, five hundred thirty-four".