51977641 has 2 divisors, whose sum is σ = 51977642. Its totient is φ = 51977640.

The previous prime is 51977621. The next prime is 51977647. The reversal of 51977641 is 14677915.

51977641 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., 51840000 + 137641 = 7200^2 + 371^2 .

It is a cyclic number.

It is not a de Polignac number, because 51977641 - 2⁹ = 51977129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51977594 and 51977603.

It is not a weakly prime, because it can be changed into another prime (51977647) 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, 25988820 + 25988821.

It is an arithmetic number, because the mean of its divisors is an integer number (25988821).

Almost surely, 2^51977641 is an apocalyptic number.

It is an amenable number.

51977641 is a deficient number, since it is larger than the sum of its proper divisors (1).

51977641 is an equidigital number, since it uses as much as digits as its factorization.

51977641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 51977641 is about 7209.5520665295. The cubic root of 51977641 is about 373.1976110784.

The spelling of 51977641 in words is "fifty-one million, nine hundred seventy-seven thousand, six hundred forty-one".