225645225437 has 2 divisors, whose sum is σ = 225645225438. Its totient is φ = 225645225436.

The previous prime is 225645225433. The next prime is 225645225439. The reversal of 225645225437 is 734522546522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145720846756 + 79924378681 = 381734^2 + 282709^2 .

It is a cyclic number.

It is not a de Polignac number, because 225645225437 - 2² = 225645225433 is a prime.

Together with 225645225439, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 225645225391 and 225645225400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225645225431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112822612718 + 112822612719.

It is an arithmetic number, because the mean of its divisors is an integer number (112822612719).

Almost surely, 2^225645225437 is an apocalyptic number.

It is an amenable number.

225645225437 is a deficient number, since it is larger than the sum of its proper divisors (1).

225645225437 is an equidigital number, since it uses as much as digits as its factorization.

225645225437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 47.

The spelling of 225645225437 in words is "two hundred twenty-five billion, six hundred forty-five million, two hundred twenty-five thousand, four hundred thirty-seven".