725222388509 has 2 divisors, whose sum is σ = 725222388510. Its totient is φ = 725222388508.

The previous prime is 725222388503. The next prime is 725222388533. The reversal of 725222388509 is 905883222527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 724451215609 + 771172900 = 851147^2 + 27770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725222388509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725222388503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362611194254 + 362611194255.

It is an arithmetic number, because the mean of its divisors is an integer number (362611194255).

Almost surely, 2^725222388509 is an apocalyptic number.

It is an amenable number.

725222388509 is a deficient number, since it is larger than the sum of its proper divisors (1).

725222388509 is an equidigital number, since it uses as much as digits as its factorization.

725222388509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 725222388509 in words is "seven hundred twenty-five billion, two hundred twenty-two million, three hundred eighty-eight thousand, five hundred nine".