55051911 has 24 divisors (see below), whose sum is σ = 85662720. Its totient is φ = 33956496.

The previous prime is 55051907. The next prime is 55051937. The reversal of 55051911 is 11915055.

It is not a de Polignac number, because 55051911 - 2² = 55051907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55051111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3610 + ... + 11096.

It is an arithmetic number, because the mean of its divisors is an integer number (3569280).

Almost surely, 2^55051911 is an apocalyptic number.

55051911 is a deficient number, since it is larger than the sum of its proper divisors (30610809).

55051911 is a wasteful number, since it uses less digits than its factorization.

55051911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7555 (or 7552 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 27.

The square root of 55051911 is about 7419.6975005724. The cubic root of 55051911 is about 380.4148539480.

Adding to 55051911 its reverse (11915055), we get a palindrome (66966966).

The spelling of 55051911 in words is "fifty-five million, fifty-one thousand, nine hundred eleven".