227720051136 has 196 divisors, whose sum is σ = 678156143304. Its totient is φ = 75834662400.

The previous prime is 227720051123. The next prime is 227720051183. The reversal of 227720051136 is 631150027722.

227720051136 is a `hidden beast` number, since 2 + 277 + 200 + 51 + 136 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 227720051136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 75627871 + ... + 75630881.

Almost surely, 2^227720051136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 227720051136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339078071652).

227720051136 is an abundant number, since it is smaller than the sum of its proper divisors (450436092168).

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

227720051136 is an equidigital number, since it uses as much as digits as its factorization.

227720051136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4637 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

Adding to 227720051136 its reverse (631150027722), we get a palindrome (858870078858).

The spelling of 227720051136 in words is "two hundred twenty-seven billion, seven hundred twenty million, fifty-one thousand, one hundred thirty-six".