1220225453 has 4 divisors (see below), whose sum is σ = 1221249468. Its totient is φ = 1219201440.

The previous prime is 1220225443. The next prime is 1220225471. The reversal of 1220225453 is 3545220221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 819505129 + 400720324 = 28627^2 + 20018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220225453 - 2¹⁰ = 1220224429 is a prime.

It is a super-2 number, since 2×1220225453² = 2977900312298110418, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220225423) 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, 510218 + ... + 512603.

It is an arithmetic number, because the mean of its divisors is an integer number (305312367).

Almost surely, 2^1220225453 is an apocalyptic number.

It is an amenable number.

1220225453 is a deficient number, since it is larger than the sum of its proper divisors (1024015).

1220225453 is a wasteful number, since it uses less digits than its factorization.

1220225453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024014.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1220225453 is about 34931.7255943648. The cubic root of 1220225453 is about 1068.5955466503.

Adding to 1220225453 its reverse (3545220221), we get a palindrome (4765445674).

The spelling of 1220225453 in words is "one billion, two hundred twenty million, two hundred twenty-five thousand, four hundred fifty-three".