248565639 has 16 divisors (see below), whose sum is σ = 381040128. Its totient is φ = 141184992.

The previous prime is 248565637. The next prime is 248565649. The reversal of 248565639 is 936565842.

It is not a de Polignac number, because 248565639 - 2¹ = 248565637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248565631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31932 + ... + 38945.

It is an arithmetic number, because the mean of its divisors is an integer number (23815008).

Almost surely, 2^248565639 is an apocalyptic number.

248565639 is a deficient number, since it is larger than the sum of its proper divisors (132474489).

248565639 is a wasteful number, since it uses less digits than its factorization.

248565639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71054.

The product of its digits is 1555200, while the sum is 48.

The square root of 248565639 is about 15765.9645756294. The cubic root of 248565639 is about 628.7534256961.

The spelling of 248565639 in words is "two hundred forty-eight million, five hundred sixty-five thousand, six hundred thirty-nine".