227758972081 has 27 divisors (see below), whose sum is σ = 246197243019. Its totient is φ = 210657995328.

The previous prime is 227758972073. The next prime is 227758972097. The reversal of 227758972081 is 180279857722.

The square root of 227758972081 is 477241.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 177320999025 + 50437973056 = 421095^2 + 224584^2 .

It is not a de Polignac number, because 227758972081 - 2³ = 227758972073 is a prime.

It is a super-2 number, since 2×227758972081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (227758972031) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 543577290 + ... + 543577708.

Almost surely, 2^227758972081 is an apocalyptic number.

227758972081 is the 477241-st square number.

227758972081 is the 238621-st centered octagonal number.

It is an amenable number.

227758972081 is a deficient number, since it is larger than the sum of its proper divisors (18438270938).

227758972081 is an frugal number, since it uses more digits than its factorization.

227758972081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 227758972081 in words is "two hundred twenty-seven billion, seven hundred fifty-eight million, nine hundred seventy-two thousand, eighty-one".