229131587 has 2 divisors, whose sum is σ = 229131588. Its totient is φ = 229131586.

The previous prime is 229131527. The next prime is 229131601. The reversal of 229131587 is 785131922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 229131587 - 2²² = 224937283 is a prime.

It is a super-2 number, since 2×229131587² = 105002568322277138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 229131587.

It is not a weakly prime, because it can be changed into another prime (229131527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114565793 + 114565794.

It is an arithmetic number, because the mean of its divisors is an integer number (114565794).

Almost surely, 2^229131587 is an apocalyptic number.

229131587 is a deficient number, since it is larger than the sum of its proper divisors (1).

229131587 is an equidigital number, since it uses as much as digits as its factorization.

229131587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 229131587 is about 15137.0930828875. The cubic root of 229131587 is about 611.9204787602.

The spelling of 229131587 in words is "two hundred twenty-nine million, one hundred thirty-one thousand, five hundred eighty-seven".