225122172424 has 8 divisors (see below), whose sum is σ = 422104073310. Its totient is φ = 112561086208.

The previous prime is 225122172409. The next prime is 225122172439. The reversal of 225122172424 is 424271221522.

It is an interprime number because it is at equal distance from previous prime (225122172409) and next prime (225122172439).

It can be written as a sum of positive squares in only one way, i.e., 224943415524 + 178756900 = 474282^2 + 13370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 225122172424.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14070135769 + ... + 14070135784.

Almost surely, 2^225122172424 is an apocalyptic number.

It is an amenable number.

225122172424 is a deficient number, since it is larger than the sum of its proper divisors (196981900886).

225122172424 is a wasteful number, since it uses less digits than its factorization.

225122172424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28140271559 (or 28140271555 counting only the distinct ones).

The product of its digits is 35840, while the sum is 34.

Adding to 225122172424 its reverse (424271221522), we get a palindrome (649393393946).

The spelling of 225122172424 in words is "two hundred twenty-five billion, one hundred twenty-two million, one hundred seventy-two thousand, four hundred twenty-four".