2253203021 has 4 divisors (see below), whose sum is σ = 2253324444. Its totient is φ = 2253081600.

The previous prime is 2253202997. The next prime is 2253203081. The reversal of 2253203021 is 1203023522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1203023522 = 2 ⋅601511761.

It can be written as a sum of positive squares in 2 ways, for example, as 1559460100 + 693742921 = 39490^2 + 26339^2 .

It is a cyclic number.

It is not a de Polignac number, because 2253203021 - 2²² = 2249008717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2253202984 and 2253203002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2253203081) 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, 26420 + ... + 72141.

It is an arithmetic number, because the mean of its divisors is an integer number (563331111).

Almost surely, 2^2253203021 is an apocalyptic number.

It is an amenable number.

2253203021 is a deficient number, since it is larger than the sum of its proper divisors (121423).

2253203021 is an equidigital number, since it uses as much as digits as its factorization.

2253203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121422.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2253203021 is about 47467.9157010290. The cubic root of 2253203021 is about 1310.9922015190.

Adding to 2253203021 its reverse (1203023522), we get a palindrome (3456226543).

The spelling of 2253203021 in words is "two billion, two hundred fifty-three million, two hundred three thousand, twenty-one".