551559973 has 2 divisors, whose sum is σ = 551559974. Its totient is φ = 551559972.

The previous prime is 551559929. The next prime is 551559979. The reversal of 551559973 is 379955155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407151684 + 144408289 = 20178^2 + 12017^2 .

It is a cyclic number.

It is not a de Polignac number, because 551559973 - 2¹⁷ = 551428901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551559979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275779986 + 275779987.

It is an arithmetic number, because the mean of its divisors is an integer number (275779987).

Almost surely, 2^551559973 is an apocalyptic number.

It is an amenable number.

551559973 is a deficient number, since it is larger than the sum of its proper divisors (1).

551559973 is an equidigital number, since it uses as much as digits as its factorization.

551559973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1063125, while the sum is 49.

The square root of 551559973 is about 23485.3139855528. The cubic root of 551559973 is about 820.0951570118.

The spelling of 551559973 in words is "five hundred fifty-one million, five hundred fifty-nine thousand, nine hundred seventy-three".