55520553 has 16 divisors (see below), whose sum is σ = 82084032. Its totient is φ = 33096000.

The previous prime is 55520539. The next prime is 55520557. The reversal of 55520553 is 35502555.

It is not a de Polignac number, because 55520553 - 2⁴ = 55520537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55520553.

It is not an unprimeable number, because it can be changed into a prime (55520557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11778 + ... + 15803.

It is an arithmetic number, because the mean of its divisors is an integer number (5130252).

Almost surely, 2^55520553 is an apocalyptic number.

It is an amenable number.

55520553 is a deficient number, since it is larger than the sum of its proper divisors (26563479).

55520553 is a wasteful number, since it uses less digits than its factorization.

55520553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27656.

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 55520553 is about 7451.2115122307. The cubic root of 55520553 is about 381.4912615011.

The spelling of 55520553 in words is "fifty-five million, five hundred twenty thousand, five hundred fifty-three".