551081731 has 2 divisors, whose sum is σ = 551081732. Its totient is φ = 551081730.

The previous prime is 551081717. The next prime is 551081753. The reversal of 551081731 is 137180155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551081731 - 2¹⁹ = 550557443 is a prime.

It is a super-2 number, since 2×551081731² = 607382148483912722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 551081693 and 551081702.

It is not a weakly prime, because it can be changed into another prime (551081701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275540865 + 275540866.

It is an arithmetic number, because the mean of its divisors is an integer number (275540866).

Almost surely, 2^551081731 is an apocalyptic number.

551081731 is a deficient number, since it is larger than the sum of its proper divisors (1).

551081731 is an equidigital number, since it uses as much as digits as its factorization.

551081731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 551081731 is about 23475.1300528879. The cubic root of 551081731 is about 819.8580613932.

The spelling of 551081731 in words is "five hundred fifty-one million, eighty-one thousand, seven hundred thirty-one".