2145254253 has 4 divisors (see below), whose sum is σ = 2860339008. Its totient is φ = 1430169500.

The previous prime is 2145254249. The next prime is 2145254269. The reversal of 2145254253 is 3524525412.

It is a happy number.

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 2145254253 - 2² = 2145254249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145254213) 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, 357542373 + ... + 357542378.

It is an arithmetic number, because the mean of its divisors is an integer number (715084752).

Almost surely, 2^2145254253 is an apocalyptic number.

It is an amenable number.

2145254253 is a deficient number, since it is larger than the sum of its proper divisors (715084755).

2145254253 is an equidigital number, since it uses as much as digits as its factorization.

2145254253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715084754.

The product of its digits is 48000, while the sum is 33.

The square root of 2145254253 is about 46316.8895004835. The cubic root of 2145254253 is about 1289.7125439661.

Adding to 2145254253 its reverse (3524525412), we get a palindrome (5669779665).

The spelling of 2145254253 in words is "two billion, one hundred forty-five million, two hundred fifty-four thousand, two hundred fifty-three".