65894531 has 4 divisors (see below), whose sum is σ = 65910912. Its totient is φ = 65878152.

The previous prime is 65894459. The next prime is 65894537. The reversal of 65894531 is 13549856.

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 is a cyclic number.

It is not a de Polignac number, because 65894531 - 2¹⁴ = 65878147 is a prime.

It is a super-2 number, since 2×65894531² = 8684178431419922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65894537) 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, 2465 + ... + 11741.

It is an arithmetic number, because the mean of its divisors is an integer number (16477728).

Almost surely, 2^65894531 is an apocalyptic number.

65894531 is a deficient number, since it is larger than the sum of its proper divisors (16381).

65894531 is an equidigital number, since it uses as much as digits as its factorization.

65894531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380.

The product of its digits is 129600, while the sum is 41.

The square root of 65894531 is about 8117.5446410845. The cubic root of 65894531 is about 403.9086218684.

The spelling of 65894531 in words is "sixty-five million, eight hundred ninety-four thousand, five hundred thirty-one".