1222521453 has 12 divisors (see below), whose sum is σ = 1766173500. Its totient is φ = 814871616.

The previous prime is 1222521451. The next prime is 1222521467. The reversal of 1222521453 is 3541252221.

1222521453 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 538332804 + 684188649 = 23202^2 + 26157^2 .

It is not a de Polignac number, because 1222521453 - 2¹ = 1222521451 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222521451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78673 + ... + 92921.

It is an arithmetic number, because the mean of its divisors is an integer number (147181125).

Almost surely, 2^1222521453 is an apocalyptic number.

It is an amenable number.

1222521453 is a deficient number, since it is larger than the sum of its proper divisors (543652047).

1222521453 is a wasteful number, since it uses less digits than its factorization.

1222521453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23788 (or 23785 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1222521453 is about 34964.5742573823. The cubic root of 1222521453 is about 1069.2653567873.

Adding to 1222521453 its reverse (3541252221), we get a palindrome (4763773674).

The spelling of 1222521453 in words is "one billion, two hundred twenty-two million, five hundred twenty-one thousand, four hundred fifty-three".