55129630 has 24 divisors (see below), whose sum is σ = 102013128. Its totient is φ = 21450528.

The previous prime is 55129619. The next prime is 55129631. The reversal of 55129630 is 3692155.

55129630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55129630² = 6078552207873800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55129592 and 55129601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55129631) 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 11 ways as a sum of consecutive naturals, for example, 11677 + ... + 15703.

It is an arithmetic number, because the mean of its divisors is an integer number (4250547).

Almost surely, 2^55129630 is an apocalyptic number.

55129630 is a deficient number, since it is larger than the sum of its proper divisors (46883498).

55129630 is a wasteful number, since it uses less digits than its factorization.

55129630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108 (or 4071 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 55129630 is about 7424.9329963307. The cubic root of 55129630 is about 380.5937854297.

The spelling of 55129630 in words is "fifty-five million, one hundred twenty-nine thousand, six hundred thirty".