65285551 has 2 divisors, whose sum is σ = 65285552. Its totient is φ = 65285550.

The previous prime is 65285543. The next prime is 65285557. The reversal of 65285551 is 15558256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65285551 - 2³ = 65285543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65285551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65285557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32642775 + 32642776.

It is an arithmetic number, because the mean of its divisors is an integer number (32642776).

Almost surely, 2^65285551 is an apocalyptic number.

65285551 is a deficient number, since it is larger than the sum of its proper divisors (1).

65285551 is an equidigital number, since it uses as much as digits as its factorization.

65285551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60000, while the sum is 37.

The square root of 65285551 is about 8079.9474627005. The cubic root of 65285551 is about 402.6604964145.

The spelling of 65285551 in words is "sixty-five million, two hundred eighty-five thousand, five hundred fifty-one".