201656061 has 20 divisors (see below), whose sum is σ = 303626752. Its totient is φ = 133372008.

The previous prime is 201656051. The next prime is 201656087. The reversal of 201656061 is 160656102.

It is a happy number.

201656061 is a `hidden beast` number, since 2 + 0 + 1 + 656 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 201656061 - 2¹³ = 201647869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201656051) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 486 + ... + 20088.

Almost surely, 2^201656061 is an apocalyptic number.

It is an amenable number.

201656061 is a deficient number, since it is larger than the sum of its proper divisors (101970691).

201656061 is a wasteful number, since it uses less digits than its factorization.

201656061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19742 (or 19733 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 201656061 is about 14200.5655169081. The cubic root of 201656061 is about 586.4132301433.

The spelling of 201656061 in words is "two hundred one million, six hundred fifty-six thousand, sixty-one".