52161111 has 16 divisors (see below), whose sum is σ = 79941600. Its totient is φ = 33574464.

The previous prime is 52161103. The next prime is 52161113. The reversal of 52161111 is 11116125.

It is a happy number.

52161111 is a `hidden beast` number, since 52 + 1 + 611 + 1 + 1 = 666.

It is not a de Polignac number, because 52161111 - 2³ = 52161103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52161113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32526 + ... + 34091.

It is an arithmetic number, because the mean of its divisors is an integer number (4996350).

Almost surely, 2^52161111 is an apocalyptic number.

52161111 is a deficient number, since it is larger than the sum of its proper divisors (27780489).

52161111 is a wasteful number, since it uses less digits than its factorization.

52161111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66655 (or 66649 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 52161111 is about 7222.2649494463. The cubic root of 52161111 is about 373.6361981313.

Adding to 52161111 its reverse (11116125), we get a palindrome (63277236).

The spelling of 52161111 in words is "fifty-two million, one hundred sixty-one thousand, one hundred eleven".