55163533 has 2 divisors, whose sum is σ = 55163534. Its totient is φ = 55163532.

The previous prime is 55163531. The next prime is 55163557. The reversal of 55163533 is 33536155.

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., 49028004 + 6135529 = 7002^2 + 2477^2 .

It is a cyclic number.

It is not a de Polignac number, because 55163533 - 2¹ = 55163531 is a prime.

Together with 55163531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 55163495 and 55163504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55163531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27581766 + 27581767.

It is an arithmetic number, because the mean of its divisors is an integer number (27581767).

Almost surely, 2^55163533 is an apocalyptic number.

It is an amenable number.

55163533 is a deficient number, since it is larger than the sum of its proper divisors (1).

55163533 is an equidigital number, since it uses as much as digits as its factorization.

55163533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 31.

The square root of 55163533 is about 7427.2156963427. The cubic root of 55163533 is about 380.6717872046.

Adding to 55163533 its reverse (33536155), we get a palindrome (88699688).

It can be divided in two parts, 55163 and 533, that added together give a square (55696 = 236²).

The spelling of 55163533 in words is "fifty-five million, one hundred sixty-three thousand, five hundred thirty-three".