55940023 has 4 divisors (see below), whose sum is σ = 55994400. Its totient is φ = 55885648.

The previous prime is 55939991. The next prime is 55940057. The reversal of 55940023 is 32004955.

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

It is a cyclic number.

It is not a de Polignac number, because 55940023 - 2⁵ = 55939991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55939973 and 55940000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55940323) 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, 25615 + ... + 27712.

It is an arithmetic number, because the mean of its divisors is an integer number (13998600).

Almost surely, 2^55940023 is an apocalyptic number.

55940023 is a deficient number, since it is larger than the sum of its proper divisors (54377).

55940023 is a wasteful number, since it uses less digits than its factorization.

55940023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54376.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55940023 is about 7479.3063181020. The cubic root of 55940023 is about 382.4496021998.

Adding to 55940023 its reverse (32004955), we get a palindrome (87944978).

The spelling of 55940023 in words is "fifty-five million, nine hundred forty thousand, twenty-three".