52100661 has 4 divisors (see below), whose sum is σ = 69467552. Its totient is φ = 34733772.

The previous prime is 52100651. The next prime is 52100693. The reversal of 52100661 is 16600125.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52100661 - 2⁷ = 52100533 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 (52100651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8683441 + ... + 8683446.

It is an arithmetic number, because the mean of its divisors is an integer number (17366888).

Almost surely, 2^52100661 is an apocalyptic number.

It is an amenable number.

52100661 is a deficient number, since it is larger than the sum of its proper divisors (17366891).

52100661 is a wasteful number, since it uses less digits than its factorization.

52100661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17366890.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 52100661 is about 7218.0787610000. The cubic root of 52100661 is about 373.4918055079.

Adding to 52100661 its reverse (16600125), we get a palindrome (68700786).

The spelling of 52100661 in words is "fifty-two million, one hundred thousand, six hundred sixty-one".