55363821 has 8 divisors (see below), whose sum is σ = 73856640. Its totient is φ = 36890112.

The previous prime is 55363807. The next prime is 55363831. The reversal of 55363821 is 12836355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55363821 - 2¹¹ = 55361773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55363801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4636 + ... + 11498.

It is an arithmetic number, because the mean of its divisors is an integer number (9232080).

Almost surely, 2^55363821 is an apocalyptic number.

It is an amenable number.

55363821 is a deficient number, since it is larger than the sum of its proper divisors (18492819).

55363821 is a wasteful number, since it uses less digits than its factorization.

55363821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9555.

The product of its digits is 21600, while the sum is 33.

The square root of 55363821 is about 7440.6868634556. The cubic root of 55363821 is about 381.1319456752.

The spelling of 55363821 in words is "fifty-five million, three hundred sixty-three thousand, eight hundred twenty-one".