55125551 has 8 divisors (see below), whose sum is σ = 59912160. Its totient is φ = 50416992.

The previous prime is 55125547. The next prime is 55125557. The reversal of 55125551 is 15552155.

55125551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55125551 - 2² = 55125547 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 (55125557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18035 + ... + 20868.

It is an arithmetic number, because the mean of its divisors is an integer number (7489020).

Almost surely, 2^55125551 is an apocalyptic number.

55125551 is a deficient number, since it is larger than the sum of its proper divisors (4786609).

55125551 is a wasteful number, since it uses less digits than its factorization.

55125551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39025.

The product of its digits is 6250, while the sum is 29.

The square root of 55125551 is about 7424.6583086362. The cubic root of 55125551 is about 380.5843985819.

The spelling of 55125551 in words is "fifty-five million, one hundred twenty-five thousand, five hundred fifty-one".