51654121 has 2 divisors, whose sum is σ = 51654122. Its totient is φ = 51654120.

The previous prime is 51654107. The next prime is 51654151. The reversal of 51654121 is 12145615.

It is a happy number.

51654121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47610000 + 4044121 = 6900^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 51654121 - 2⁷ = 51653993 is a prime.

It is not a weakly prime, because it can be changed into another prime (51654101) 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, 25827060 + 25827061.

It is an arithmetic number, because the mean of its divisors is an integer number (25827061).

Almost surely, 2^51654121 is an apocalyptic number.

It is an amenable number.

51654121 is a deficient number, since it is larger than the sum of its proper divisors (1).

51654121 is an equidigital number, since it uses as much as digits as its factorization.

51654121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 51654121 is about 7187.0801442589. The cubic root of 51654121 is about 372.4217116977.

Adding to 51654121 its reverse (12145615), we get a palindrome (63799736).

The spelling of 51654121 in words is "fifty-one million, six hundred fifty-four thousand, one hundred twenty-one".