65572249 has 4 divisors (see below), whose sum is σ = 69023440. Its totient is φ = 62121060.

The previous prime is 65572237. The next prime is 65572253. The reversal of 65572249 is 94227556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65572249 - 2²³ = 57183641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65575249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725567 + ... + 1725604.

It is an arithmetic number, because the mean of its divisors is an integer number (17255860).

Almost surely, 2^65572249 is an apocalyptic number.

It is an amenable number.

65572249 is a deficient number, since it is larger than the sum of its proper divisors (3451191).

65572249 is a wasteful number, since it uses less digits than its factorization.

65572249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451190.

The product of its digits is 151200, while the sum is 40.

The square root of 65572249 is about 8097.6693560555. The cubic root of 65572249 is about 403.2490563770.

Adding to 65572249 its product of digits (151200), we get a square (65723449 = 8107²).

The spelling of 65572249 in words is "sixty-five million, five hundred seventy-two thousand, two hundred forty-nine".