64751231 has 2 divisors, whose sum is σ = 64751232. Its totient is φ = 64751230.

The previous prime is 64751227. The next prime is 64751251. The reversal of 64751231 is 13215746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64751231 - 2² = 64751227 is a prime.

It is a super-2 number, since 2×64751231² = 8385443832030722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64751194 and 64751203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64751251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32375615 + 32375616.

It is an arithmetic number, because the mean of its divisors is an integer number (32375616).

Almost surely, 2^64751231 is an apocalyptic number.

64751231 is a deficient number, since it is larger than the sum of its proper divisors (1).

64751231 is an equidigital number, since it uses as much as digits as its factorization.

64751231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 64751231 is about 8046.8149599702. The cubic root of 64751231 is about 401.5589806381.

Adding to 64751231 its reverse (13215746), we get a palindrome (77966977).

The spelling of 64751231 in words is "sixty-four million, seven hundred fifty-one thousand, two hundred thirty-one".