51936641 has 4 divisors (see below), whose sum is σ = 53340372. Its totient is φ = 50532912.

The previous prime is 51936629. The next prime is 51936659. The reversal of 51936641 is 14663915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32444416 + 19492225 = 5696^2 + 4415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51936641 is a prime.

It is a super-3 number, since 3×51936641³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51936041) 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, 701810 + ... + 701883.

It is an arithmetic number, because the mean of its divisors is an integer number (13335093).

Almost surely, 2^51936641 is an apocalyptic number.

It is an amenable number.

51936641 is a deficient number, since it is larger than the sum of its proper divisors (1403731).

51936641 is a wasteful number, since it uses less digits than its factorization.

51936641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403730.

The product of its digits is 19440, while the sum is 35.

The square root of 51936641 is about 7206.7080556937. The cubic root of 51936641 is about 373.0994590865.

The spelling of 51936641 in words is "fifty-one million, nine hundred thirty-six thousand, six hundred forty-one".