55505615 has 8 divisors (see below), whose sum is σ = 72661968. Its totient is φ = 40367680.

The previous prime is 55505609. The next prime is 55505621. The reversal of 55505615 is 51650555.

It is an interprime number because it is at equal distance from previous prime (55505609) and next prime (55505621).

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

It is not a de Polignac number, because 55505615 - 2¹⁶ = 55440079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504542 + ... + 504651.

It is an arithmetic number, because the mean of its divisors is an integer number (9082746).

Almost surely, 2^55505615 is an apocalyptic number.

55505615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55505615 is a deficient number, since it is larger than the sum of its proper divisors (17156353).

55505615 is a wasteful number, since it uses less digits than its factorization.

55505615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009209.

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

The square root of 55505615 is about 7450.2090574695. The cubic root of 55505615 is about 381.4570445771.

The spelling of 55505615 in words is "fifty-five million, five hundred five thousand, six hundred fifteen".