551720153 has 2 divisors, whose sum is σ = 551720154. Its totient is φ = 551720152.

The previous prime is 551720129. The next prime is 551720179. The reversal of 551720153 is 351027155.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477553609 + 74166544 = 21853^2 + 8612^2 .

It is a cyclic number.

It is not a de Polignac number, because 551720153 - 2²⁰ = 550671577 is a prime.

It is not a weakly prime, because it can be changed into another prime (551720053) 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, 275860076 + 275860077.

It is an arithmetic number, because the mean of its divisors is an integer number (275860077).

Almost surely, 2^551720153 is an apocalyptic number.

It is an amenable number.

551720153 is a deficient number, since it is larger than the sum of its proper divisors (1).

551720153 is an equidigital number, since it uses as much as digits as its factorization.

551720153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 551720153 is about 23488.7239542722. The cubic root of 551720153 is about 820.1745380004.

The spelling of 551720153 in words is "five hundred fifty-one million, seven hundred twenty thousand, one hundred fifty-three".