55615505 has 8 divisors (see below), whose sum is σ = 72805824. Its totient is φ = 40447600.

The previous prime is 55615493. The next prime is 55615513. The reversal of 55615505 is 50551655.

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

It is not a de Polignac number, because 55615505 - 2⁸ = 55615249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505541 + ... + 505650.

It is an arithmetic number, because the mean of its divisors is an integer number (9100728).

Almost surely, 2^55615505 is an apocalyptic number.

55615505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55615505 is a deficient number, since it is larger than the sum of its proper divisors (17190319).

55615505 is a wasteful number, since it uses less digits than its factorization.

55615505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011207.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 55615505 is about 7457.5803716755. The cubic root of 55615505 is about 381.7086148114.

It can be divided in two parts, 556 and 15505, that added together give a palindrome (16061).

The spelling of 55615505 in words is "fifty-five million, six hundred fifteen thousand, five hundred five".