55763621 has 4 divisors (see below), whose sum is σ = 59043852. Its totient is φ = 52483392.

The previous prime is 55763611. The next prime is 55763623. The reversal of 55763621 is 12636755.

55763621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46430596 + 9333025 = 6814^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 55763621 - 2⁶ = 55763557 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 (55763623) 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 3 ways as a sum of consecutive naturals, for example, 1640090 + ... + 1640123.

It is an arithmetic number, because the mean of its divisors is an integer number (14760963).

Almost surely, 2^55763621 is an apocalyptic number.

It is an amenable number.

55763621 is a deficient number, since it is larger than the sum of its proper divisors (3280231).

55763621 is a wasteful number, since it uses less digits than its factorization.

55763621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280230.

The product of its digits is 37800, while the sum is 35.

The square root of 55763621 is about 7467.5043354524. The cubic root of 55763621 is about 382.0471717009.

The spelling of 55763621 in words is "fifty-five million, seven hundred sixty-three thousand, six hundred twenty-one".