65433257 has 4 divisors (see below), whose sum is σ = 65449476. Its totient is φ = 65417040.

The previous prime is 65433239. The next prime is 65433307. The reversal of 65433257 is 75233456.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11909401 + 53523856 = 3451^2 + 7316^2 .

It is a cyclic number.

It is not a de Polignac number, because 65433257 - 2⁸ = 65433001 is a prime.

It is a super-2 number, since 2×65433257² = 8563022243256098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65433227) 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, 3203 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (16362369).

Almost surely, 2^65433257 is an apocalyptic number.

It is an amenable number.

65433257 is a deficient number, since it is larger than the sum of its proper divisors (16219).

65433257 is an equidigital number, since it uses as much as digits as its factorization.

65433257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16218.

The product of its digits is 75600, while the sum is 35.

The square root of 65433257 is about 8089.0825808617. The cubic root of 65433257 is about 402.9639355528.

The spelling of 65433257 in words is "sixty-five million, four hundred thirty-three thousand, two hundred fifty-seven".