55115601 has 8 divisors (see below), whose sum is σ = 74874240. Its totient is φ = 36050352.

The previous prime is 55115591. The next prime is 55115611. The reversal of 55115601 is 10651155.

It is an interprime number because it is at equal distance from previous prime (55115591) and next prime (55115611).

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

It is a de Polignac number, because none of the positive numbers 2^k-55115601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55115611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173161 + ... + 173478.

It is an arithmetic number, because the mean of its divisors is an integer number (9359280).

Almost surely, 2^55115601 is an apocalyptic number.

It is an amenable number.

55115601 is a deficient number, since it is larger than the sum of its proper divisors (19758639).

55115601 is a wasteful number, since it uses less digits than its factorization.

55115601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346695.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 55115601 is about 7423.9882138915. The cubic root of 55115601 is about 380.5614990821.

Adding to 55115601 its reverse (10651155), we get a palindrome (65766756).

The spelling of 55115601 in words is "fifty-five million, one hundred fifteen thousand, six hundred one".