55616533 has 4 divisors (see below), whose sum is σ = 63561760. Its totient is φ = 47671308.

The previous prime is 55616479. The next prime is 55616549. The reversal of 55616533 is 33561655.

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 not a de Polignac number, because 55616533 - 2²¹ = 53519381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55616563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3972603 + ... + 3972616.

It is an arithmetic number, because the mean of its divisors is an integer number (15890440).

Almost surely, 2^55616533 is an apocalyptic number.

It is an amenable number.

55616533 is a deficient number, since it is larger than the sum of its proper divisors (7945227).

55616533 is an equidigital number, since it uses as much as digits as its factorization.

55616533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945226.

The product of its digits is 40500, while the sum is 34.

The square root of 55616533 is about 7457.6492945163. The cubic root of 55616533 is about 381.7109666378.

The spelling of 55616533 in words is "fifty-five million, six hundred sixteen thousand, five hundred thirty-three".