225243447437 has 2 divisors, whose sum is σ = 225243447438. Its totient is φ = 225243447436.

The previous prime is 225243447427. The next prime is 225243447479. The reversal of 225243447437 is 734744342522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147249480361 + 77993967076 = 383731^2 + 279274^2 .

It is a cyclic number.

It is not a de Polignac number, because 225243447437 - 2³² = 220948480141 is a prime.

It is a super-2 number, since 2×225243447437² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225243447391 and 225243447400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225243447427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112621723718 + 112621723719.

It is an arithmetic number, because the mean of its divisors is an integer number (112621723719).

Almost surely, 2^225243447437 is an apocalyptic number.

It is an amenable number.

225243447437 is a deficient number, since it is larger than the sum of its proper divisors (1).

225243447437 is an equidigital number, since it uses as much as digits as its factorization.

225243447437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 47.

Adding to 225243447437 its reverse (734744342522), we get a palindrome (959987789959).

The spelling of 225243447437 in words is "two hundred twenty-five billion, two hundred forty-three million, four hundred forty-seven thousand, four hundred thirty-seven".