55621061 has 16 divisors (see below), whose sum is σ = 59439744. Its totient is φ = 51938304.

The previous prime is 55621031. The next prime is 55621063. The reversal of 55621061 is 16012655.

55621061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55621061 - 2¹⁸ = 55358917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55621061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55621063) 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 15 ways as a sum of consecutive naturals, for example, 238601 + ... + 238833.

It is an arithmetic number, because the mean of its divisors is an integer number (3714984).

Almost surely, 2^55621061 is an apocalyptic number.

It is an amenable number.

55621061 is a deficient number, since it is larger than the sum of its proper divisors (3818683).

55621061 is a wasteful number, since it uses less digits than its factorization.

55621061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 55621061 is about 7457.9528692531. The cubic root of 55621061 is about 381.7213253103.

The spelling of 55621061 in words is "fifty-five million, six hundred twenty-one thousand, sixty-one".