229291520 has 40 divisors (see below), whose sum is σ = 549768384. Its totient is φ = 91715584.

The previous prime is 229291511. The next prime is 229291541. The reversal of 229291520 is 25192922.

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

It is a super-2 number, since 2×229291520² = 105149202287820800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42224 + ... + 47343.

Almost surely, 2^229291520 is an apocalyptic number.

229291520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229291520 is an abundant number, since it is smaller than the sum of its proper divisors (320476864).

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

229291520 is an frugal number, since it uses more digits than its factorization.

229291520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89590 (or 89574 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 229291520 is about 15142.3749788466. The cubic root of 229291520 is about 612.0628183913.

The spelling of 229291520 in words is "two hundred twenty-nine million, two hundred ninety-one thousand, five hundred twenty".