55515129 has 8 divisors (see below), whose sum is σ = 74603520. Its totient is φ = 36718416.

The previous prime is 55515127. The next prime is 55515139. The reversal of 55515129 is 92151555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55515129 - 2¹ = 55515127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55515129.

It is not an unprimeable number, because it can be changed into a prime (55515121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72474 + ... + 73235.

It is an arithmetic number, because the mean of its divisors is an integer number (9325440).

Almost surely, 2^55515129 is an apocalyptic number.

It is an amenable number.

55515129 is a deficient number, since it is larger than the sum of its proper divisors (19088391).

55515129 is a wasteful number, since it uses less digits than its factorization.

55515129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145839.

The product of its digits is 11250, while the sum is 33.

The square root of 55515129 is about 7450.8475356834. The cubic root of 55515129 is about 381.4788380178.

The spelling of 55515129 in words is "fifty-five million, five hundred fifteen thousand, one hundred twenty-nine".