248311919 has 4 divisors (see below), whose sum is σ = 250590120. Its totient is φ = 246033720.

The previous prime is 248311913. The next prime is 248311981. The reversal of 248311919 is 919113842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919113842 = 2 ⋅459556921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248311919 is a prime.

It is a super-2 number, since 2×248311919² = 123317618234925122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248311913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138937 + ... + 1139154.

It is an arithmetic number, because the mean of its divisors is an integer number (62647530).

Almost surely, 2^248311919 is an apocalyptic number.

248311919 is a deficient number, since it is larger than the sum of its proper divisors (2278201).

248311919 is a wasteful number, since it uses less digits than its factorization.

248311919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278200.

The product of its digits is 15552, while the sum is 38.

The square root of 248311919 is about 15757.9160741514. The cubic root of 248311919 is about 628.5394223594.

The spelling of 248311919 in words is "two hundred forty-eight million, three hundred eleven thousand, nine hundred nineteen".