51223000 has 64 divisors (see below), whose sum is σ = 120949920. Its totient is φ = 20304000.

The previous prime is 51222991. The next prime is 51223009. The reversal of 51223000 is 32215.

51223000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51222991) and next prime (51223009).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180859 + ... + 181141.

Almost surely, 2^51223000 is an apocalyptic number.

51223000 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 51223000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60474960).

51223000 is an abundant number, since it is smaller than the sum of its proper divisors (69726920).

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

51223000 is a wasteful number, since it uses less digits than its factorization.

51223000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 51223000 is about 7157.0245214055. The cubic root of 51223000 is about 371.3827007315.

Adding to 51223000 its reverse (32215), we get a palindrome (51255215).

The spelling of 51223000 in words is "fifty-one million, two hundred twenty-three thousand".