55029861 has 10 divisors (see below), whose sum is σ = 82205222. Its totient is φ = 36686520.

The previous prime is 55029859. The next prime is 55029881. The reversal of 55029861 is 16892055.

It is a happy number.

55029861 is a `hidden beast` number, since 5 + 502 + 98 + 61 = 666.

55029861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 43639236 + 11390625 = 6606^2 + 3375^2 .

It is not a de Polignac number, because 55029861 - 2¹ = 55029859 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 (55029881) 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 9 ways as a sum of consecutive naturals, for example, 339610 + ... + 339771.

Almost surely, 2^55029861 is an apocalyptic number.

It is an amenable number.

55029861 is a deficient number, since it is larger than the sum of its proper divisors (27175361).

55029861 is an equidigital number, since it uses as much as digits as its factorization.

55029861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679393 (or 679384 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 55029861 is about 7418.2114421200. The cubic root of 55029861 is about 380.3640578446.

The spelling of 55029861 in words is "fifty-five million, twenty-nine thousand, eight hundred sixty-one".