55511129 has 4 divisors (see below), whose sum is σ = 56050176. Its totient is φ = 54972084.

The previous prime is 55511123. The next prime is 55511143. The reversal of 55511129 is 92111555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92111555 = 5 ⋅18422311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55511129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55511123) 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, 269369 + ... + 269574.

It is an arithmetic number, because the mean of its divisors is an integer number (14012544).

Almost surely, 2^55511129 is an apocalyptic number.

It is an amenable number.

55511129 is a deficient number, since it is larger than the sum of its proper divisors (539047).

55511129 is a wasteful number, since it uses less digits than its factorization.

55511129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539046.

The product of its digits is 2250, while the sum is 29.

The square root of 55511129 is about 7450.5791050092. The cubic root of 55511129 is about 381.4696756385.

The spelling of 55511129 in words is "fifty-five million, five hundred eleven thousand, one hundred twenty-nine".