249988755 has 16 divisors (see below), whose sum is σ = 400619520. Its totient is φ = 133114848.

The previous prime is 249988747. The next prime is 249988769. The reversal of 249988755 is 557889942.

It is a happy number.

It is not a de Polignac number, because 249988755 - 2³ = 249988747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249988695 and 249988704.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3315 + ... + 22604.

It is an arithmetic number, because the mean of its divisors is an integer number (25038720).

Almost surely, 2^249988755 is an apocalyptic number.

249988755 is a deficient number, since it is larger than the sum of its proper divisors (150630765).

249988755 is a wasteful number, since it uses less digits than its factorization.

249988755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26570.

The product of its digits is 7257600, while the sum is 57.

The square root of 249988755 is about 15811.0326987202. The cubic root of 249988755 is about 629.9510795977.

It can be divided in two parts, 2499887 and 55, that added together give a palindrome (2499942).

The spelling of 249988755 in words is "two hundred forty-nine million, nine hundred eighty-eight thousand, seven hundred fifty-five".