229920511 has 4 divisors (see below), whose sum is σ = 230111272. Its totient is φ = 229729752.

The previous prime is 229920469. The next prime is 229920517. The reversal of 229920511 is 115029922.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 229920511 - 2²³ = 221531903 is a prime.

It is a super-2 number, since 2×229920511² = 105726882757002242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229920517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93561 + ... + 95986.

It is an arithmetic number, because the mean of its divisors is an integer number (57527818).

Almost surely, 2^229920511 is an apocalyptic number.

229920511 is a deficient number, since it is larger than the sum of its proper divisors (190761).

229920511 is a wasteful number, since it uses less digits than its factorization.

229920511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190760.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 229920511 is about 15163.1299869123. The cubic root of 229920511 is about 612.6219763183.

The spelling of 229920511 in words is "two hundred twenty-nine million, nine hundred twenty thousand, five hundred eleven".