248200721 has 2 divisors, whose sum is σ = 248200722. Its totient is φ = 248200720.

The previous prime is 248200717. The next prime is 248200723. The reversal of 248200721 is 127002842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234243025 + 13957696 = 15305^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 248200721 - 2² = 248200717 is a prime.

It is a super-5 number, since 5×248200721⁵ (a number of 43 digits) contains 55555 as substring.

It is a Sophie Germain prime.

Together with 248200723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (248200723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124100360 + 124100361.

It is an arithmetic number, because the mean of its divisors is an integer number (124100361).

Almost surely, 2^248200721 is an apocalyptic number.

It is an amenable number.

248200721 is a deficient number, since it is larger than the sum of its proper divisors (1).

248200721 is an equidigital number, since it uses as much as digits as its factorization.

248200721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 248200721 is about 15754.3873571777. The cubic root of 248200721 is about 628.4455850565.

The spelling of 248200721 in words is "two hundred forty-eight million, two hundred thousand, seven hundred twenty-one".