1222544425 has 6 divisors (see below), whose sum is σ = 1515955118. Its totient is φ = 978035520.

The previous prime is 1222544423. The next prime is 1222544441. The reversal of 1222544425 is 5244452221.

It can be written as a sum of positive squares in 3 ways, for example, as 85303696 + 1137240729 = 9236^2 + 33723^2 .

It is not a de Polignac number, because 1222544425 - 2¹ = 1222544423 is a prime.

It is a super-2 number, since 2×1222544425² = 2989229742197161250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222544423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24450864 + ... + 24450913.

Almost surely, 2^1222544425 is an apocalyptic number.

It is an amenable number.

1222544425 is a deficient number, since it is larger than the sum of its proper divisors (293410693).

1222544425 is an equidigital number, since it uses as much as digits as its factorization.

1222544425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48901787 (or 48901782 counting only the distinct ones).

The product of its digits is 25600, while the sum is 31.

The square root of 1222544425 is about 34964.9027597675. The cubic root of 1222544425 is about 1069.2720541503.

Adding to 1222544425 its reverse (5244452221), we get a palindrome (6466996646).

The spelling of 1222544425 in words is "one billion, two hundred twenty-two million, five hundred forty-four thousand, four hundred twenty-five".