201611061 has 6 divisors (see below), whose sum is σ = 291215990. Its totient is φ = 134407368.

The previous prime is 201611057. The next prime is 201611089. The reversal of 201611061 is 160116102.

It can be written as a sum of positive squares in only one way, i.e., 116510436 + 85100625 = 10794^2 + 9225^2 .

It is not a de Polignac number, because 201611061 - 2² = 201611057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201611051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11200606 + ... + 11200623.

Almost surely, 2^201611061 is an apocalyptic number.

It is an amenable number.

201611061 is a deficient number, since it is larger than the sum of its proper divisors (89604929).

201611061 is a wasteful number, since it uses less digits than its factorization.

201611061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22401235 (or 22401232 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 201611061 is about 14198.9809845636. The cubic root of 201611061 is about 586.3696070913.

Adding to 201611061 its reverse (160116102), we get a palindrome (361727163).

The spelling of 201611061 in words is "two hundred one million, six hundred eleven thousand, sixty-one".