55510620 has 96 divisors (see below), whose sum is σ = 170989056. Its totient is φ = 13344000.

The previous prime is 55510613. The next prime is 55510643. The reversal of 55510620 is 2601555.

55510620 = T₃₁₉ + T₃₂₀ + ... + T₇₁₄.

55510620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 99382 + ... + 99938.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^55510620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55510620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85494528).

55510620 is an abundant number, since it is smaller than the sum of its proper divisors (115478436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55510620 is a wasteful number, since it uses less digits than its factorization.

55510620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 55510620 is about 7450.5449465123. The cubic root of 55510620 is about 381.4685096941.

It can be divided in two parts, 555 and 10620, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 55510620 in words is "fifty-five million, five hundred ten thousand, six hundred twenty".