248213905 has 4 divisors (see below), whose sum is σ = 297856692. Its totient is φ = 198571120.

The previous prime is 248213897. The next prime is 248213939. The reversal of 248213905 is 509312842.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177182721 + 71031184 = 13311^2 + 8428^2 .

It is not a de Polignac number, because 248213905 - 2³ = 248213897 is a prime.

It is a super-2 number, since 2×248213905² = 123220285270698050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24821386 + ... + 24821395.

It is an arithmetic number, because the mean of its divisors is an integer number (74464173).

Almost surely, 2^248213905 is an apocalyptic number.

It is an amenable number.

248213905 is a deficient number, since it is larger than the sum of its proper divisors (49642787).

248213905 is an equidigital number, since it uses as much as digits as its factorization.

248213905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49642786.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 248213905 is about 15754.8057747470. The cubic root of 248213905 is about 628.4567121796.

The spelling of 248213905 in words is "two hundred forty-eight million, two hundred thirteen thousand, nine hundred five".