55345501 has 4 divisors (see below), whose sum is σ = 55428412. Its totient is φ = 55262592.

The previous prime is 55345487. The next prime is 55345519. The reversal of 55345501 is 10554355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40018276 + 15327225 = 6326^2 + 3915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55345501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55345501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55340501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40446 + ... + 41791.

It is an arithmetic number, because the mean of its divisors is an integer number (13857103).

Almost surely, 2^55345501 is an apocalyptic number.

It is an amenable number.

55345501 is a deficient number, since it is larger than the sum of its proper divisors (82911).

55345501 is an equidigital number, since it uses as much as digits as its factorization.

55345501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82910.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55345501 is about 7439.4556924549. The cubic root of 55345501 is about 381.0899019276.

Adding to 55345501 its reverse (10554355), we get a palindrome (65899856).

The spelling of 55345501 in words is "fifty-five million, three hundred forty-five thousand, five hundred one".