65072551 has 2 divisors, whose sum is σ = 65072552. Its totient is φ = 65072550.

The previous prime is 65072521. The next prime is 65072569. The reversal of 65072551 is 15527056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65072551 - 2¹¹ = 65070503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65072521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32536275 + 32536276.

It is an arithmetic number, because the mean of its divisors is an integer number (32536276).

Almost surely, 2^65072551 is an apocalyptic number.

65072551 is a deficient number, since it is larger than the sum of its proper divisors (1).

65072551 is an equidigital number, since it uses as much as digits as its factorization.

65072551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 65072551 is about 8066.7559154842. The cubic root of 65072551 is about 402.2221139153. Note that the first 3 decimals are identical.

The spelling of 65072551 in words is "sixty-five million, seventy-two thousand, five hundred fifty-one".