229515557 has 2 divisors, whose sum is σ = 229515558. Its totient is φ = 229515556.

The previous prime is 229515529. The next prime is 229515563. The reversal of 229515557 is 755515922.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149842081 + 79673476 = 12241^2 + 8926^2 .

It is a cyclic number.

It is not a de Polignac number, because 229515557 - 2⁸ = 229515301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229515457) 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, 114757778 + 114757779.

It is an arithmetic number, because the mean of its divisors is an integer number (114757779).

Almost surely, 2^229515557 is an apocalyptic number.

It is an amenable number.

229515557 is a deficient number, since it is larger than the sum of its proper divisors (1).

229515557 is an equidigital number, since it uses as much as digits as its factorization.

229515557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157500, while the sum is 41.

The square root of 229515557 is about 15149.7708563529. The cubic root of 229515557 is about 612.2620990291.

The spelling of 229515557 in words is "two hundred twenty-nine million, five hundred fifteen thousand, five hundred fifty-seven".