551272081 has 2 divisors, whose sum is σ = 551272082. Its totient is φ = 551272080.

The previous prime is 551272079. The next prime is 551272087. The reversal of 551272081 is 180272155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 550606225 + 665856 = 23465^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 551272081 - 2¹ = 551272079 is a prime.

It is a super-2 number, since 2×551272081² = 607801814580141122, which contains 22 as substring.

Together with 551272079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (551272087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275636040 + 275636041.

It is an arithmetic number, because the mean of its divisors is an integer number (275636041).

Almost surely, 2^551272081 is an apocalyptic number.

It is an amenable number.

551272081 is a deficient number, since it is larger than the sum of its proper divisors (1).

551272081 is an equidigital number, since it uses as much as digits as its factorization.

551272081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 551272081 is about 23479.1839934867. The cubic root of 551272081 is about 819.9524466772.

The spelling of 551272081 in words is "five hundred fifty-one million, two hundred seventy-two thousand, eighty-one".