55023040 has 28 divisors (see below), whose sum is σ = 131024376. Its totient is φ = 22009088.

The previous prime is 55023029. The next prime is 55023049. The reversal of 55023040 is 4032055.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 55022999 and 55023017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55023049) 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, 85654 + ... + 86293.

It is an arithmetic number, because the mean of its divisors is an integer number (4679442).

Almost surely, 2^55023040 is an apocalyptic number.

It is an amenable number.

55023040 is an abundant number, since it is smaller than the sum of its proper divisors (76001336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55023040 is a wasteful number, since it uses less digits than its factorization.

55023040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171964 (or 171954 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 55023040 is about 7417.7516809341. The cubic root of 55023040 is about 380.3483417080.

Adding to 55023040 its reverse (4032055), we get a palindrome (59055095).

The spelling of 55023040 in words is "fifty-five million, twenty-three thousand, forty".