51052661 has 4 divisors (see below), whose sum is σ = 55693824. Its totient is φ = 46411500.

The previous prime is 51052643. The next prime is 51052681. The reversal of 51052661 is 16625015.

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 a cyclic number.

It is not a de Polignac number, because 51052661 - 2¹⁴ = 51036277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51052661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51052681) 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, 2320565 + ... + 2320586.

It is an arithmetic number, because the mean of its divisors is an integer number (13923456).

Almost surely, 2^51052661 is an apocalyptic number.

It is an amenable number.

51052661 is a deficient number, since it is larger than the sum of its proper divisors (4641163).

51052661 is a wasteful number, since it uses less digits than its factorization.

51052661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641162.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 51052661 is about 7145.1144847371. The cubic root of 51052661 is about 370.9705732939.

Adding to 51052661 its reverse (16625015), we get a palindrome (67677676).

The spelling of 51052661 in words is "fifty-one million, fifty-two thousand, six hundred sixty-one".