551293231 has 2 divisors, whose sum is σ = 551293232. Its totient is φ = 551293230.

The previous prime is 551293207. The next prime is 551293247. The reversal of 551293231 is 132392155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551293231 - 2⁵ = 551293199 is a prime.

It is a super-2 number, since 2×551293231² = 607848453092838722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 551293193 and 551293202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551293031) 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, 275646615 + 275646616.

It is an arithmetic number, because the mean of its divisors is an integer number (275646616).

Almost surely, 2^551293231 is an apocalyptic number.

551293231 is a deficient number, since it is larger than the sum of its proper divisors (1).

551293231 is an equidigital number, since it uses as much as digits as its factorization.

551293231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 551293231 is about 23479.6343881245. The cubic root of 551293231 is about 819.9629325897.

The spelling of 551293231 in words is "five hundred fifty-one million, two hundred ninety-three thousand, two hundred thirty-one".