55501243 has 16 divisors (see below), whose sum is σ = 68091840. Its totient is φ = 44153856.

The previous prime is 55501211. The next prime is 55501267. The reversal of 55501243 is 34210555.

It is a cyclic number.

It is not a de Polignac number, because 55501243 - 2⁵ = 55501211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55501343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5493 + ... + 11881.

It is an arithmetic number, because the mean of its divisors is an integer number (4255740).

Almost surely, 2^55501243 is an apocalyptic number.

55501243 is a deficient number, since it is larger than the sum of its proper divisors (12590597).

55501243 is a wasteful number, since it uses less digits than its factorization.

55501243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55501243 is about 7449.9156371062. The cubic root of 55501243 is about 381.4470289298.

Adding to 55501243 its reverse (34210555), we get a palindrome (89711798).

The spelling of 55501243 in words is "fifty-five million, five hundred one thousand, two hundred forty-three".