249052155 has 16 divisors (see below), whose sum is σ = 434709504. Its totient is φ = 120752480.

The previous prime is 249052127. The next prime is 249052183. The reversal of 249052155 is 551250942.

It is an interprime number because it is at equal distance from previous prime (249052127) and next prime (249052183).

It is not a de Polignac number, because 249052155 - 2⁵ = 249052123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754539 + ... + 754868.

It is an arithmetic number, because the mean of its divisors is an integer number (27169344).

Almost surely, 2^249052155 is an apocalyptic number.

249052155 is a deficient number, since it is larger than the sum of its proper divisors (185657349).

249052155 is a wasteful number, since it uses less digits than its factorization.

249052155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509426.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 249052155 is about 15781.3863459457. The cubic root of 249052155 is about 629.1633767548.

It can be divided in two parts, 2490 and 52155, that added together give a palindrome (54645).

The spelling of 249052155 in words is "two hundred forty-nine million, fifty-two thousand, one hundred fifty-five".