55129955 has 8 divisors (see below), whose sum is σ = 66431904. Its totient is φ = 43920000.

The previous prime is 55129951. The next prime is 55129961. The reversal of 55129955 is 55992155.

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

It is not a de Polignac number, because 55129955 - 2² = 55129951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55129951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21671 + ... + 24080.

It is an arithmetic number, because the mean of its divisors is an integer number (8303988).

Almost surely, 2^55129955 is an apocalyptic number.

55129955 is a deficient number, since it is larger than the sum of its proper divisors (11301949).

55129955 is a wasteful number, since it uses less digits than its factorization.

55129955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45997.

The product of its digits is 101250, while the sum is 41.

The square root of 55129955 is about 7424.9548820178. The cubic root of 55129955 is about 380.5945333199.

The spelling of 55129955 in words is "fifty-five million, one hundred twenty-nine thousand, nine hundred fifty-five".