65512553 has 2 divisors, whose sum is σ = 65512554. Its totient is φ = 65512552.

The previous prime is 65512493. The next prime is 65512561. The reversal of 65512553 is 35521556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53699584 + 11812969 = 7328^2 + 3437^2 .

It is a cyclic number.

It is not a de Polignac number, because 65512553 - 2⁸ = 65512297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65512583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32756276 + 32756277.

It is an arithmetic number, because the mean of its divisors is an integer number (32756277).

Almost surely, 2^65512553 is an apocalyptic number.

It is an amenable number.

65512553 is a deficient number, since it is larger than the sum of its proper divisors (1).

65512553 is an equidigital number, since it uses as much as digits as its factorization.

65512553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22500, while the sum is 32.

The square root of 65512553 is about 8093.9825178956. The cubic root of 65512553 is about 403.1266485761.

The spelling of 65512553 in words is "sixty-five million, five hundred twelve thousand, five hundred fifty-three".