4131220525 has 12 divisors (see below), whose sum is σ = 5134557652. Its totient is φ = 3297335040.

The previous prime is 4131220441. The next prime is 4131220531. The reversal of 4131220525 is 5250221314.

It can be written as a sum of positive squares in 6 ways, for example, as 807582724 + 3323637801 = 28418^2 + 57651^2 .

It is not a de Polignac number, because 4131220525 - 2²³ = 4122831917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4131220525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179994 + ... + 201643.

Almost surely, 2^4131220525 is an apocalyptic number.

It is an amenable number.

4131220525 is a deficient number, since it is larger than the sum of its proper divisors (1003337127).

4131220525 is a wasteful number, since it uses less digits than its factorization.

4131220525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382080 (or 382075 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 4131220525 is about 64274.5713715774. The cubic root of 4131220525 is about 1604.5729236388.

Adding to 4131220525 its reverse (5250221314), we get a palindrome (9381441839).

The spelling of 4131220525 in words is "four billion, one hundred thirty-one million, two hundred twenty thousand, five hundred twenty-five".