64627231 has 2 divisors, whose sum is σ = 64627232. Its totient is φ = 64627230.

The previous prime is 64627207. The next prime is 64627249. The reversal of 64627231 is 13272646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64627231 - 2⁷ = 64627103 is a prime.

It is a super-2 number, since 2×64627231² = 8353357973454722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64627193 and 64627202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64627201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32313615 + 32313616.

It is an arithmetic number, because the mean of its divisors is an integer number (32313616).

Almost surely, 2^64627231 is an apocalyptic number.

64627231 is a deficient number, since it is larger than the sum of its proper divisors (1).

64627231 is an equidigital number, since it uses as much as digits as its factorization.

64627231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 64627231 is about 8039.1063558085. The cubic root of 64627231 is about 401.3024854756.

Adding to 64627231 its reverse (13272646), we get a palindrome (77899877).

The spelling of 64627231 in words is "sixty-four million, six hundred twenty-seven thousand, two hundred thirty-one".