55516553 has 2 divisors, whose sum is σ = 55516554. Its totient is φ = 55516552.

The previous prime is 55516547. The next prime is 55516589. The reversal of 55516553 is 35561555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52461049 + 3055504 = 7243^2 + 1748^2 .

It is a cyclic number.

It is not a de Polignac number, because 55516553 - 2⁸ = 55516297 is a prime.

It is a super-3 number, since 3×55516553³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55516523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27758276 + 27758277.

It is an arithmetic number, because the mean of its divisors is an integer number (27758277).

Almost surely, 2^55516553 is an apocalyptic number.

It is an amenable number.

55516553 is a deficient number, since it is larger than the sum of its proper divisors (1).

55516553 is an equidigital number, since it uses as much as digits as its factorization.

55516553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56250, while the sum is 35.

The square root of 55516553 is about 7450.9430946693. The cubic root of 55516553 is about 381.4820997185.

The spelling of 55516553 in words is "fifty-five million, five hundred sixteen thousand, five hundred fifty-three".