2005402253 has 4 divisors (see below), whose sum is σ = 2110949760. Its totient is φ = 1899854748.

The previous prime is 2005402249. The next prime is 2005402261. The reversal of 2005402253 is 3522045002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2005402253 - 2² = 2005402249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005402213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52773725 + ... + 52773762.

It is an arithmetic number, because the mean of its divisors is an integer number (527737440).

Almost surely, 2^2005402253 is an apocalyptic number.

It is an amenable number.

2005402253 is a deficient number, since it is larger than the sum of its proper divisors (105547507).

2005402253 is a wasteful number, since it uses less digits than its factorization.

2005402253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105547506.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 2005402253 is about 44781.7178433342. The cubic root of 2005402253 is about 1261.0544320823.

Adding to 2005402253 its reverse (3522045002), we get a palindrome (5527447255).

The spelling of 2005402253 in words is "two billion, five million, four hundred two thousand, two hundred fifty-three".