55533553 has 4 divisors (see below), whose sum is σ = 56362480. Its totient is φ = 54704628.

The previous prime is 55533547. The next prime is 55533563. The reversal of 55533553 is 35533555.

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 55533553 - 2¹³ = 55525361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55533563) 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, 414363 + ... + 414496.

It is an arithmetic number, because the mean of its divisors is an integer number (14090620).

Almost surely, 2^55533553 is an apocalyptic number.

It is an amenable number.

55533553 is a deficient number, since it is larger than the sum of its proper divisors (828927).

55533553 is an equidigital number, since it uses as much as digits as its factorization.

55533553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828926.

The product of its digits is 84375, while the sum is 34.

The square root of 55533553 is about 7452.0838025347. The cubic root of 55533553 is about 381.5210342555.

The spelling of 55533553 in words is "fifty-five million, five hundred thirty-three thousand, five hundred fifty-three".