51961841 has 4 divisors (see below), whose sum is σ = 52030884. Its totient is φ = 51892800.

The previous prime is 51961829. The next prime is 51961879. The reversal of 51961841 is 14816915.

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 2961841 + 49000000 = 1721^2 + 7000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51961841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51961891) 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, 33380 + ... + 34901.

It is an arithmetic number, because the mean of its divisors is an integer number (13007721).

Almost surely, 2^51961841 is an apocalyptic number.

It is an amenable number.

51961841 is a deficient number, since it is larger than the sum of its proper divisors (69043).

51961841 is an equidigital number, since it uses as much as digits as its factorization.

51961841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69042.

The product of its digits is 8640, while the sum is 35.

The square root of 51961841 is about 7208.4562147522. The cubic root of 51961841 is about 373.1597927671.

The spelling of 51961841 in words is "fifty-one million, nine hundred sixty-one thousand, eight hundred forty-one".