64231511 has 2 divisors, whose sum is σ = 64231512. Its totient is φ = 64231510.

The previous prime is 64231507. The next prime is 64231513. The reversal of 64231511 is 11513246.

64231511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64231511 - 2² = 64231507 is a prime.

Together with 64231513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64231513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32115755 + 32115756.

It is an arithmetic number, because the mean of its divisors is an integer number (32115756).

Almost surely, 2^64231511 is an apocalyptic number.

64231511 is a deficient number, since it is larger than the sum of its proper divisors (1).

64231511 is an equidigital number, since it uses as much as digits as its factorization.

64231511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 64231511 is about 8014.4563758249. The cubic root of 64231511 is about 400.4817341809.

Adding to 64231511 its reverse (11513246), we get a palindrome (75744757).

The spelling of 64231511 in words is "sixty-four million, two hundred thirty-one thousand, five hundred eleven".