115877221 has 2 divisors, whose sum is σ = 115877222. Its totient is φ = 115877220.

The previous prime is 115877141. The next prime is 115877227. The reversal of 115877221 is 122778511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115562500 + 314721 = 10750^2 + 561^2 .

It is an emirp because it is prime and its reverse (122778511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115877221 - 2¹³ = 115869029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115877227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57938610 + 57938611.

It is an arithmetic number, because the mean of its divisors is an integer number (57938611).

Almost surely, 2^115877221 is an apocalyptic number.

It is an amenable number.

115877221 is a deficient number, since it is larger than the sum of its proper divisors (1).

115877221 is an equidigital number, since it uses as much as digits as its factorization.

115877221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 34.

The square root of 115877221 is about 10764.6282332461. The cubic root of 115877221 is about 487.5277683942.

The spelling of 115877221 in words is "one hundred fifteen million, eight hundred seventy-seven thousand, two hundred twenty-one".