228161300722520 has 64 divisors (see below), whose sum is σ = 573691607627040. Its totient is φ = 80944142156800.

The previous prime is 228161300722517. The next prime is 228161300722609. The reversal of 228161300722520 is 25227003161822.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6323743067 + ... + 6323779146.

Almost surely, 2^{228161300722520} is an apocalyptic number.

228161300722520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228161300722520 is an abundant number, since it is smaller than the sum of its proper divisors (345530306904520).

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

228161300722520 is a wasteful number, since it uses less digits than its factorization.

228161300722520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12647522276 (or 12647522272 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 228161300722520 in words is "two hundred twenty-eight trillion, one hundred sixty-one billion, three hundred million, seven hundred twenty-two thousand, five hundred twenty".