55404823 has 2 divisors, whose sum is σ = 55404824. Its totient is φ = 55404822.

The previous prime is 55404821. The next prime is 55404847. The reversal of 55404823 is 32840455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55404823 - 2¹ = 55404821 is a prime.

It is a super-2 number, since 2×55404823² = 6139388823322658, which contains 22 as substring.

Together with 55404821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55404821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27702411 + 27702412.

It is an arithmetic number, because the mean of its divisors is an integer number (27702412).

Almost surely, 2^55404823 is an apocalyptic number.

55404823 is a deficient number, since it is larger than the sum of its proper divisors (1).

55404823 is an equidigital number, since it uses as much as digits as its factorization.

55404823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 55404823 is about 7443.4416099006. The cubic root of 55404823 is about 381.2260102078.

The spelling of 55404823 in words is "fifty-five million, four hundred four thousand, eight hundred twenty-three".