55023500 has 96 divisors (see below), whose sum is σ = 139776000. Its totient is φ = 18532800.

The previous prime is 55023491. The next prime is 55023503. The reversal of 55023500 is 532055.

55023500 = T₂₂₅ + T₂₂₆ + ... + T₆₉₈.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (55023503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276401 + ... + 276599.

It is an arithmetic number, because the mean of its divisors is an integer number (1456000).

Almost surely, 2^55023500 is an apocalyptic number.

55023500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55023500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69888000).

55023500 is an abundant number, since it is smaller than the sum of its proper divisors (84752500).

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

55023500 is a wasteful number, since it uses less digits than its factorization.

55023500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 55023500 is about 7417.7826875691. The cubic root of 55023500 is about 380.3494016261.

Adding to 55023500 its reverse (532055), we get a palindrome (55555555).

The spelling of 55023500 in words is "fifty-five million, twenty-three thousand, five hundred".