51912000 has 336 divisors, whose sum is σ = 214286592. Its totient is φ = 11750400.

The previous prime is 51911987. The next prime is 51912019. The reversal of 51912000 is 21915.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 503949 + ... + 504051.

Almost surely, 2^51912000 is an apocalyptic number.

51912000 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 51912000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107143296).

51912000 is an abundant number, since it is smaller than the sum of its proper divisors (162374592).

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

51912000 is a wasteful number, since it uses less digits than its factorization.

51912000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 51912000 is about 7204.9982650935. The cubic root of 51912000 is about 373.0404448856.

Adding to 51912000 its reverse (21915), we get a palindrome (51933915).

The spelling of 51912000 in words is "fifty-one million, nine hundred twelve thousand".