51423020 has 48 divisors (see below), whose sum is σ = 120699936. Its totient is φ = 18240000.

The previous prime is 51422999. The next prime is 51423049. The reversal of 51423020 is 2032415.

It is a self number, because there is not a number n which added to its sum of digits gives 51423020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6170 + ... + 11870.

It is an arithmetic number, because the mean of its divisors is an integer number (2514582).

Almost surely, 2^51423020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51423020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60349968).

51423020 is an abundant number, since it is smaller than the sum of its proper divisors (69276916).

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

51423020 is a wasteful number, since it uses less digits than its factorization.

51423020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762 (or 5760 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 51423020 is about 7170.9845906960. The cubic root of 51423020 is about 371.8654753110.

Adding to 51423020 its reverse (2032415), we get a palindrome (53455435).

The spelling of 51423020 in words is "fifty-one million, four hundred twenty-three thousand, twenty".