248531986 has 4 divisors (see below), whose sum is σ = 372797982. Its totient is φ = 124265992.

The previous prime is 248531981. The next prime is 248532019. The reversal of 248531986 is 689135842.

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

It can be written as a sum of positive squares in only one way, i.e., 137334961 + 111197025 = 11719^2 + 10545^2 .

It is not an unprimeable number, because it can be changed into a prime (248531981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62132995 + ... + 62132998.

Almost surely, 2^248531986 is an apocalyptic number.

248531986 is a deficient number, since it is larger than the sum of its proper divisors (124265996).

248531986 is a wasteful number, since it uses less digits than its factorization.

248531986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124265995.

The product of its digits is 414720, while the sum is 46.

The square root of 248531986 is about 15764.8972721042. The cubic root of 248531986 is about 628.7250490279.

The spelling of 248531986 in words is "two hundred forty-eight million, five hundred thirty-one thousand, nine hundred eighty-six".