55505533 has 4 divisors (see below), whose sum is σ = 55550880. Its totient is φ = 55460188.

The previous prime is 55505521. The next prime is 55505539. The reversal of 55505533 is 33550555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55505533 is a prime.

It is a super-2 number, since 2×55505533² = 6161728387228178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55505495 and 55505504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20785 + ... + 23302.

It is an arithmetic number, because the mean of its divisors is an integer number (13887720).

Almost surely, 2^55505533 is an apocalyptic number.

It is an amenable number.

55505533 is a deficient number, since it is larger than the sum of its proper divisors (45347).

55505533 is a wasteful number, since it uses less digits than its factorization.

55505533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45346.

The product of its (nonzero) digits is 28125, while the sum is 31.

The square root of 55505533 is about 7450.2035542662. The cubic root of 55505533 is about 381.4568567312.

The spelling of 55505533 in words is "fifty-five million, five hundred five thousand, five hundred thirty-three".