248691555 has 48 divisors (see below), whose sum is σ = 521636544. Its totient is φ = 106997760.

The previous prime is 248691539. The next prime is 248691577. The reversal of 248691555 is 555196842.

248691555 is a `hidden beast` number, since 2 + 4 + 8 + 6 + 91 + 555 = 666.

It is not a de Polignac number, because 248691555 - 2⁴ = 248691539 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 248691555.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 17866 + ... + 28575.

It is an arithmetic number, because the mean of its divisors is an integer number (10867428).

Almost surely, 2^248691555 is an apocalyptic number.

248691555 is an abundant number, since it is smaller than the sum of its proper divisors (272944989).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

248691555 is a wasteful number, since it uses less digits than its factorization.

248691555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46476 (or 46473 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The square root of 248691555 is about 15769.9573556811. The cubic root of 248691555 is about 628.8595770693.

The spelling of 248691555 in words is "two hundred forty-eight million, six hundred ninety-one thousand, five hundred fifty-five".