551320433 has 2 divisors, whose sum is σ = 551320434. Its totient is φ = 551320432.

The previous prime is 551320411. The next prime is 551320439. The reversal of 551320433 is 334023155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300953104 + 250367329 = 17348^2 + 15823^2 .

It is a cyclic number.

It is not a de Polignac number, because 551320433 - 2⁶ = 551320369 is a prime.

It is not a weakly prime, because it can be changed into another prime (551320439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275660216 + 275660217.

It is an arithmetic number, because the mean of its divisors is an integer number (275660217).

Almost surely, 2^551320433 is an apocalyptic number.

It is an amenable number.

551320433 is a deficient number, since it is larger than the sum of its proper divisors (1).

551320433 is an equidigital number, since it uses as much as digits as its factorization.

551320433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 551320433 is about 23480.2136489428. The cubic root of 551320433 is about 819.9764186159.

Adding to 551320433 its reverse (334023155), we get a palindrome (885343588).

The spelling of 551320433 in words is "five hundred fifty-one million, three hundred twenty thousand, four hundred thirty-three".