248661365 has 4 divisors (see below), whose sum is σ = 298393644. Its totient is φ = 198929088.

The previous prime is 248661337. The next prime is 248661367. The reversal of 248661365 is 563166842.

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 89548369 + 159112996 = 9463^2 + 12614^2 .

It is a cyclic number.

It is not a de Polignac number, because 248661365 - 2¹⁰ = 248660341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248661367) 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, 24866132 + ... + 24866141.

It is an arithmetic number, because the mean of its divisors is an integer number (74598411).

Almost surely, 2^248661365 is an apocalyptic number.

It is an amenable number.

248661365 is a deficient number, since it is larger than the sum of its proper divisors (49732279).

248661365 is an equidigital number, since it uses as much as digits as its factorization.

248661365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49732278.

The product of its digits is 207360, while the sum is 41.

The square root of 248661365 is about 15769.0001268311. Note that the first 3 decimals coincide. The cubic root of 248661365 is about 628.8341291619.

The spelling of 248661365 in words is "two hundred forty-eight million, six hundred sixty-one thousand, three hundred sixty-five".