65452251 has 4 divisors (see below), whose sum is σ = 87269672. Its totient is φ = 43634832.

The previous prime is 65452249. The next prime is 65452259. The reversal of 65452251 is 15225456.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65452251 - 2¹ = 65452249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65452259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10908706 + ... + 10908711.

It is an arithmetic number, because the mean of its divisors is an integer number (21817418).

Almost surely, 2^65452251 is an apocalyptic number.

65452251 is a deficient number, since it is larger than the sum of its proper divisors (21817421).

65452251 is a wasteful number, since it uses less digits than its factorization.

65452251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21817420.

The product of its digits is 12000, while the sum is 30.

The square root of 65452251 is about 8090.2565472301. The cubic root of 65452251 is about 403.0029226411.

It can be divided in two parts, 65452 and 251, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 65452251 in words is "sixty-five million, four hundred fifty-two thousand, two hundred fifty-one".