55500311 has 16 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 49693248.

The previous prime is 55500299. The next prime is 55500317. The reversal of 55500311 is 11300555.

It is a happy number.

It is not a de Polignac number, because 55500311 - 2¹⁰ = 55499287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500317) 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, 38180 + ... + 39606.

It is an arithmetic number, because the mean of its divisors is an integer number (3855600).

Almost surely, 2^55500311 is an apocalyptic number.

55500311 is a deficient number, since it is larger than the sum of its proper divisors (6189289).

55500311 is a wasteful number, since it uses less digits than its factorization.

55500311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 55500311 is about 7449.8530857997. The cubic root of 55500311 is about 381.4448937787. Note that the first 3 decimals are identical.

Adding to 55500311 its reverse (11300555), we get a palindrome (66800866).

The spelling of 55500311 in words is "fifty-five million, five hundred thousand, three hundred eleven".