229569993 has 6 divisors (see below), whose sum is σ = 331601114. Its totient is φ = 153046656.

The previous prime is 229569983. The next prime is 229570021. The reversal of 229569993 is 399965922.

It can be written as a sum of positive squares in only one way, i.e., 229431609 + 138384 = 15147^2 + 372^2 .

It is not a de Polignac number, because 229569993 - 2⁵ = 229569961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (229569943) 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, 12753880 + ... + 12753897.

Almost surely, 2^229569993 is an apocalyptic number.

It is an amenable number.

229569993 is a deficient number, since it is larger than the sum of its proper divisors (102031121).

229569993 is a wasteful number, since it uses less digits than its factorization.

229569993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25507783 (or 25507780 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 54.

The square root of 229569993 is about 15151.5673446677. The cubic root of 229569993 is about 612.3105001999.

Adding to 229569993 its product of digits (2361960), we get a triangular number (231931953 = T₂₁₅₃₇).

The spelling of 229569993 in words is "two hundred twenty-nine million, five hundred sixty-nine thousand, nine hundred ninety-three".