64232731 has 2 divisors, whose sum is σ = 64232732. Its totient is φ = 64232730.

The previous prime is 64232723. The next prime is 64232743. The reversal of 64232731 is 13723246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64232731 - 2³ = 64232723 is a prime.

It is a super-2 number, since 2×64232731² = 8251687463436722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64232731.

It is not a weakly prime, because it can be changed into another prime (64230731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32116365 + 32116366.

It is an arithmetic number, because the mean of its divisors is an integer number (32116366).

Almost surely, 2^64232731 is an apocalyptic number.

64232731 is a deficient number, since it is larger than the sum of its proper divisors (1).

64232731 is an equidigital number, since it uses as much as digits as its factorization.

64232731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 64232731 is about 8014.5324879247. The cubic root of 64232731 is about 400.4842697205.

Adding to 64232731 its reverse (13723246), we get a palindrome (77955977).

The spelling of 64232731 in words is "sixty-four million, two hundred thirty-two thousand, seven hundred thirty-one".