248320621 has 4 divisors (see below), whose sum is σ = 251464000. Its totient is φ = 245177244.

The previous prime is 248320619. The next prime is 248320637. The reversal of 248320621 is 126023842.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 248320621 - 2¹ = 248320619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 248320621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248320651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571571 + ... + 1571728.

It is an arithmetic number, because the mean of its divisors is an integer number (62866000).

Almost surely, 2^248320621 is an apocalyptic number.

It is an amenable number.

248320621 is a deficient number, since it is larger than the sum of its proper divisors (3143379).

248320621 is an equidigital number, since it uses as much as digits as its factorization.

248320621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143378.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 248320621 is about 15758.1921869230. The cubic root of 248320621 is about 628.5467645847.

It can be divided in two parts, 2483 and 20621, that added together give a square (23104 = 152²).

The spelling of 248320621 in words is "two hundred forty-eight million, three hundred twenty thousand, six hundred twenty-one".