725223001 has 2 divisors, whose sum is σ = 725223002. Its totient is φ = 725223000.

The previous prime is 725222999. The next prime is 725223007. The reversal of 725223001 is 100322527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591219225 + 134003776 = 24315^2 + 11576^2 .

It is a cyclic number.

It is not a de Polignac number, because 725223001 - 2¹ = 725222999 is a prime.

Together with 725222999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (725223007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362611500 + 362611501.

It is an arithmetic number, because the mean of its divisors is an integer number (362611501).

Almost surely, 2^725223001 is an apocalyptic number.

It is an amenable number.

725223001 is a deficient number, since it is larger than the sum of its proper divisors (1).

725223001 is an equidigital number, since it uses as much as digits as its factorization.

725223001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 725223001 is about 26929.9647419004. The cubic root of 725223001 is about 898.4429873234.

Adding to 725223001 its reverse (100322527), we get a palindrome (825545528).

The spelling of 725223001 in words is "seven hundred twenty-five million, two hundred twenty-three thousand, one".