253445045243 has 4 divisors (see below), whose sum is σ = 272940817968. Its totient is φ = 233949272520.

The previous prime is 253445045213. The next prime is 253445045257. The reversal of 253445045243 is 342540544352.

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

It is a cyclic number.

It is not a de Polignac number, because 253445045243 - 2¹⁰ = 253445044219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253445045243.

It is not an unprimeable number, because it can be changed into a prime (253445045213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9747886343 + ... + 9747886368.

It is an arithmetic number, because the mean of its divisors is an integer number (68235204492).

Almost surely, 2^253445045243 is an apocalyptic number.

253445045243 is a deficient number, since it is larger than the sum of its proper divisors (19495772725).

253445045243 is a wasteful number, since it uses less digits than its factorization.

253445045243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19495772724.

The product of its (nonzero) digits is 1152000, while the sum is 41.

Adding to 253445045243 its reverse (342540544352), we get a palindrome (595985589595).

The spelling of 253445045243 in words is "two hundred fifty-three billion, four hundred forty-five million, forty-five thousand, two hundred forty-three".