201157100561 has 8 divisors (see below), whose sum is σ = 213840796800. Its totient is φ = 188683052400.

The previous prime is 201157100533. The next prime is 201157100587. The reversal of 201157100561 is 165001751102.

201157100561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201157100561 - 2⁶ = 201157100497 is a prime.

It is a super-2 number, since 2×201157100561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201157103561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52410041 + ... + 52413878.

It is an arithmetic number, because the mean of its divisors is an integer number (26730099600).

Almost surely, 2^201157100561 is an apocalyptic number.

It is an amenable number.

201157100561 is a deficient number, since it is larger than the sum of its proper divisors (12683696239).

201157100561 is a wasteful number, since it uses less digits than its factorization.

201157100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104824039.

The product of its (nonzero) digits is 2100, while the sum is 29.

Adding to 201157100561 its reverse (165001751102), we get a palindrome (366158851663).

The spelling of 201157100561 in words is "two hundred one billion, one hundred fifty-seven million, one hundred thousand, five hundred sixty-one".