225315437 has 2 divisors, whose sum is σ = 225315438. Its totient is φ = 225315436.

The previous prime is 225315407. The next prime is 225315451. The reversal of 225315437 is 734513522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198077476 + 27237961 = 14074^2 + 5219^2 .

It is a cyclic number.

It is not a de Polignac number, because 225315437 - 2¹⁶ = 225249901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225315407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112657718 + 112657719.

It is an arithmetic number, because the mean of its divisors is an integer number (112657719).

Almost surely, 2^225315437 is an apocalyptic number.

It is an amenable number.

225315437 is a deficient number, since it is larger than the sum of its proper divisors (1).

225315437 is an equidigital number, since it uses as much as digits as its factorization.

225315437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 32.

The square root of 225315437 is about 15010.5108840439. The cubic root of 225315437 is about 608.5042966955.

Adding to 225315437 its reverse (734513522), we get a palindrome (959828959).

The spelling of 225315437 in words is "two hundred twenty-five million, three hundred fifteen thousand, four hundred thirty-seven".