51455653 has 2 divisors, whose sum is σ = 51455654. Its totient is φ = 51455652.

The previous prime is 51455639. The next prime is 51455671. The reversal of 51455653 is 35655415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48902049 + 2553604 = 6993^2 + 1598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51455653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51455603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25727826 + 25727827.

It is an arithmetic number, because the mean of its divisors is an integer number (25727827).

Almost surely, 2^51455653 is an apocalyptic number.

It is an amenable number.

51455653 is a deficient number, since it is larger than the sum of its proper divisors (1).

51455653 is an equidigital number, since it uses as much as digits as its factorization.

51455653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45000, while the sum is 34.

The square root of 51455653 is about 7173.2595798563. The cubic root of 51455653 is about 371.9441205039.

The spelling of 51455653 in words is "fifty-one million, four hundred fifty-five thousand, six hundred fifty-three".