55415553 has 8 divisors (see below), whose sum is σ = 74101728. Its totient is φ = 36836544.

The previous prime is 55415537. The next prime is 55415557. The reversal of 55415553 is 35551455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55415553 - 2⁴ = 55415537 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55415557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25576 + ... + 27657.

It is an arithmetic number, because the mean of its divisors is an integer number (9262716).

Almost surely, 2^55415553 is an apocalyptic number.

It is an amenable number.

55415553 is a deficient number, since it is larger than the sum of its proper divisors (18686175).

55415553 is a wasteful number, since it uses less digits than its factorization.

55415553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53583.

The product of its digits is 37500, while the sum is 33.

The square root of 55415553 is about 7444.1623437429. The cubic root of 55415553 is about 381.2506187216.

The spelling of 55415553 in words is "fifty-five million, four hundred fifteen thousand, five hundred fifty-three".