551272681 has 2 divisors, whose sum is σ = 551272682. Its totient is φ = 551272680.

The previous prime is 551272679. The next prime is 551272703. The reversal of 551272681 is 186272155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505845081 + 45427600 = 22491^2 + 6740^2 .

It is a cyclic number.

It is not a de Polignac number, because 551272681 - 2¹ = 551272679 is a prime.

It is a super-2 number, since 2×551272681² = 607803137633855522, which contains 22 as substring.

Together with 551272679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 551272681.

It is not a weakly prime, because it can be changed into another prime (551272621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275636340 + 275636341.

It is an arithmetic number, because the mean of its divisors is an integer number (275636341).

Almost surely, 2^551272681 is an apocalyptic number.

It is an amenable number.

551272681 is a deficient number, since it is larger than the sum of its proper divisors (1).

551272681 is an equidigital number, since it uses as much as digits as its factorization.

551272681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 551272681 is about 23479.1967707586. The cubic root of 551272681 is about 819.9527441536.

The spelling of 551272681 in words is "five hundred fifty-one million, two hundred seventy-two thousand, six hundred eighty-one".