55641823 has 4 divisors (see below), whose sum is σ = 58570360. Its totient is φ = 52713288.

The previous prime is 55641811. The next prime is 55641827. The reversal of 55641823 is 32814655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32814655 = 5 ⋅6562931.

It is a cyclic number.

It is not a de Polignac number, because 55641823 - 2⁵ = 55641791 is a prime.

It is a super-3 number, since 3×55641823³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55641827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464240 + ... + 1464277.

It is an arithmetic number, because the mean of its divisors is an integer number (14642590).

Almost surely, 2^55641823 is an apocalyptic number.

55641823 is a deficient number, since it is larger than the sum of its proper divisors (2928537).

55641823 is a wasteful number, since it uses less digits than its factorization.

55641823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2928536.

The product of its digits is 28800, while the sum is 34.

The square root of 55641823 is about 7459.3446763104. The cubic root of 55641823 is about 381.7688151886.

The spelling of 55641823 in words is "fifty-five million, six hundred forty-one thousand, eight hundred twenty-three".