4425131231581 has 2 divisors, whose sum is σ = 4425131231582. Its totient is φ = 4425131231580.

The previous prime is 4425131231569. The next prime is 4425131231603. The reversal of 4425131231581 is 1851321315244.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3248537616900 + 1176593614681 = 1802370^2 + 1084709^2 .

It is a cyclic number.

It is not a de Polignac number, because 4425131231581 - 2⁷ = 4425131231453 is a prime.

It is a super-2 number, since 2×4425131231581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4425131231881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2212565615790 + 2212565615791.

It is an arithmetic number, because the mean of its divisors is an integer number (2212565615791).

Almost surely, 2^{4425131231581} is an apocalyptic number.

It is an amenable number.

4425131231581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4425131231581 is an equidigital number, since it uses as much as digits as its factorization.

4425131231581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The spelling of 4425131231581 in words is "four trillion, four hundred twenty-five billion, one hundred thirty-one million, two hundred thirty-one thousand, five hundred eighty-one".