229143987 has 6 divisors (see below), whose sum is σ = 330985772. Its totient is φ = 152762652.

The previous prime is 229143983. The next prime is 229143989. The reversal of 229143987 is 789341922.

It is not a de Polignac number, because 229143987 - 2² = 229143983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229143983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12730213 + ... + 12730230.

Almost surely, 2^229143987 is an apocalyptic number.

229143987 is a deficient number, since it is larger than the sum of its proper divisors (101841785).

229143987 is a wasteful number, since it uses less digits than its factorization.

229143987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25460449 (or 25460446 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 229143987 is about 15137.5026672169. The cubic root of 229143987 is about 611.9315170711.

The spelling of 229143987 in words is "two hundred twenty-nine million, one hundred forty-three thousand, nine hundred eighty-seven".