229657520 has 40 divisors (see below), whose sum is σ = 548391984. Its totient is φ = 89379072.

The previous prime is 229657511. The next prime is 229657531. The reversal of 229657520 is 25756922.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35834 + ... + 41753.

Almost surely, 2^229657520 is an apocalyptic number.

229657520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229657520 is an abundant number, since it is smaller than the sum of its proper divisors (318734464).

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

229657520 is a wasteful number, since it uses less digits than its factorization.

229657520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77637 (or 77631 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 229657520 is about 15154.4554504608. The cubic root of 229657520 is about 612.3883078302.

The spelling of 229657520 in words is "two hundred twenty-nine million, six hundred fifty-seven thousand, five hundred twenty".