51948661 has 2 divisors, whose sum is σ = 51948662. Its totient is φ = 51948660.

The previous prime is 51948623. The next prime is 51948667. The reversal of 51948661 is 16684915.

51948661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 8520561 = 6590^2 + 2919^2 .

It is a cyclic number.

It is not a de Polignac number, because 51948661 - 2¹¹ = 51946613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51948667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25974330 + 25974331.

It is an arithmetic number, because the mean of its divisors is an integer number (25974331).

Almost surely, 2^51948661 is an apocalyptic number.

It is an amenable number.

51948661 is a deficient number, since it is larger than the sum of its proper divisors (1).

51948661 is an equidigital number, since it uses as much as digits as its factorization.

51948661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 51948661 is about 7207.5419527048. The cubic root of 51948661 is about 373.1282397283.

The spelling of 51948661 in words is "fifty-one million, nine hundred forty-eight thousand, six hundred sixty-one".