3123221525 has 12 divisors (see below), whose sum is σ = 3919457472. Its totient is φ = 2468472240.

The previous prime is 3123221503. The next prime is 3123221527. The reversal of 3123221525 is 5251223213.

It is a happy number.

It is not a de Polignac number, because 3123221525 - 2³⁰ = 2049479701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3123221494 and 3123221503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123221527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 750509 + ... + 754658.

It is an arithmetic number, because the mean of its divisors is an integer number (326621456).

Almost surely, 2^3123221525 is an apocalyptic number.

It is an amenable number.

3123221525 is a deficient number, since it is larger than the sum of its proper divisors (796235947).

3123221525 is a wasteful number, since it uses less digits than its factorization.

3123221525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505260 (or 1505255 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 3123221525 is about 55885.7900096259. The cubic root of 3123221525 is about 1461.7314675451.

Adding to 3123221525 its reverse (5251223213), we get a palindrome (8374444738).

The spelling of 3123221525 in words is "three billion, one hundred twenty-three million, two hundred twenty-one thousand, five hundred twenty-five".