229997520 has 60 divisors (see below), whose sum is σ = 772410756. Its totient is φ = 61332480.

The previous prime is 229997507. The next prime is 229997531. The reversal of 229997520 is 25799922.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62346816 + 167650704 = 7896^2 + 12948^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159001 + ... + 160440.

Almost surely, 2^229997520 is an apocalyptic number.

229997520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229997520 is an abundant number, since it is smaller than the sum of its proper divisors (542413236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

229997520 is a wasteful number, since it uses less digits than its factorization.

229997520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319460 (or 319451 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 229997520 is about 15165.6691247040. The cubic root of 229997520 is about 612.6903653735.

The spelling of 229997520 in words is "two hundred twenty-nine million, nine hundred ninety-seven thousand, five hundred twenty".