25220131493 has 2 divisors, whose sum is σ = 25220131494. Its totient is φ = 25220131492.

The previous prime is 25220131481. The next prime is 25220131507. The reversal of 25220131493 is 39413102252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22940737444 + 2279394049 = 151462^2 + 47743^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220131493 - 2⁶ = 25220131429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25220131693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610065746 + 12610065747.

It is an arithmetic number, because the mean of its divisors is an integer number (12610065747).

Almost surely, 2^25220131493 is an apocalyptic number.

It is an amenable number.

25220131493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220131493 is an equidigital number, since it uses as much as digits as its factorization.

25220131493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 25220131493 in words is "twenty-five billion, two hundred twenty million, one hundred thirty-one thousand, four hundred ninety-three".