229526781220 has 24 divisors (see below), whose sum is σ = 525824990208. Its totient is φ = 83464284000.

The previous prime is 229526781217. The next prime is 229526781221. The reversal of 229526781220 is 22187625922.

It is not an unprimeable number, because it can be changed into a prime (229526781221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521651556 + ... + 521651995.

It is an arithmetic number, because the mean of its divisors is an integer number (21909374592).

Almost surely, 2^229526781220 is an apocalyptic number.

229526781220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229526781220 is an abundant number, since it is smaller than the sum of its proper divisors (296298208988).

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

229526781220 is a wasteful number, since it uses less digits than its factorization.

229526781220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043303571 (or 1043303569 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 229526781220 in words is "two hundred twenty-nine billion, five hundred twenty-six million, seven hundred eighty-one thousand, two hundred twenty".