225138877 has 2 divisors, whose sum is σ = 225138878. Its totient is φ = 225138876.

The previous prime is 225138857. The next prime is 225138887. The reversal of 225138877 is 778831522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217680516 + 7458361 = 14754^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 225138877 - 2¹¹ = 225136829 is a prime.

It is a super-2 number, since 2×225138877² = 101375027873642258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225138857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112569438 + 112569439.

It is an arithmetic number, because the mean of its divisors is an integer number (112569439).

Almost surely, 2^225138877 is an apocalyptic number.

It is an amenable number.

225138877 is a deficient number, since it is larger than the sum of its proper divisors (1).

225138877 is an equidigital number, since it uses as much as digits as its factorization.

225138877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The square root of 225138877 is about 15004.6285192270. The cubic root of 225138877 is about 608.3453112964.

The spelling of 225138877 in words is "two hundred twenty-five million, one hundred thirty-eight thousand, eight hundred seventy-seven".