551653 has 2 divisors, whose sum is σ = 551654. Its totient is φ = 551652.

The previous prime is 551651. The next prime is 551659. The reversal of 551653 is 356155.

551653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 550564 + 1089 = 742^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 551653 - 2¹ = 551651 is a prime.

Together with 551651, it forms a pair of twin primes.

It is equal to p₄₅₄₄₈ and since 551653 and 45448 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275826 + 275827.

It is an arithmetic number, because the mean of its divisors is an integer number (275827).

2⁵⁵¹⁶⁵³ is an apocalyptic number.

It is an amenable number.

551653 is a deficient number, since it is larger than the sum of its proper divisors (1).

551653 is an equidigital number, since it uses as much as digits as its factorization.

551653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 25.

The square root of 551653 is about 742.7334649792. The cubic root of 551653 is about 82.0141260613.

The spelling of 551653 in words is "five hundred fifty-one thousand, six hundred fifty-three".