55620837 has 20 divisors (see below), whose sum is σ = 84457516. Its totient is φ = 36469440.

The previous prime is 55620833. The next prime is 55620841. The reversal of 55620837 is 73802655.

55620837 is a `hidden beast` number, since 556 + 20 + 83 + 7 = 666.

55620837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55620833) and next prime (55620841).

It can be written as a sum of positive squares in 2 ways, for example, as 21818241 + 33802596 = 4671^2 + 5814^2 .

It is not a de Polignac number, because 55620837 - 2² = 55620833 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 (55620833) 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 19 ways as a sum of consecutive naturals, for example, 688 + ... + 10569.

Almost surely, 2^55620837 is an apocalyptic number.

It is an amenable number.

55620837 is a deficient number, since it is larger than the sum of its proper divisors (28836679).

55620837 is a wasteful number, since it uses less digits than its factorization.

55620837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11330 (or 11321 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 55620837 is about 7457.9378517121. The cubic root of 55620837 is about 381.7208128804.

The spelling of 55620837 in words is "fifty-five million, six hundred twenty thousand, eight hundred thirty-seven".