248661577 has 4 divisors (see below), whose sum is σ = 252876240. Its totient is φ = 244446916.

The previous prime is 248661557. The next prime is 248661587. The reversal of 248661577 is 775166842.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-248661577 is a prime.

It is a super-2 number, since 2×248661577² = 123665159752253858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248661527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107243 + ... + 2107360.

It is an arithmetic number, because the mean of its divisors is an integer number (63219060).

Almost surely, 2^248661577 is an apocalyptic number.

It is an amenable number.

248661577 is a deficient number, since it is larger than the sum of its proper divisors (4214663).

248661577 is an equidigital number, since it uses as much as digits as its factorization.

248661577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214662.

The product of its digits is 564480, while the sum is 46.

The square root of 248661577 is about 15769.0068488792. The cubic root of 248661577 is about 628.8343078692.

It can be divided in two parts, 248 and 661577, that added together give a triangular number (661825 = T₁₁₅₀).

The spelling of 248661577 in words is "two hundred forty-eight million, six hundred sixty-one thousand, five hundred seventy-seven".