51398112 has 96 divisors (see below), whose sum is σ = 140241024. Its totient is φ = 16473600.

The previous prime is 51398071. The next prime is 51398117. The reversal of 51398112 is 21189315.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51398112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51398117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392287 + ... + 392417.

It is an arithmetic number, because the mean of its divisors is an integer number (1460844).

Almost surely, 2^51398112 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 51398112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70120512).

51398112 is an abundant number, since it is smaller than the sum of its proper divisors (88842912).

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

51398112 is a wasteful number, since it uses less digits than its factorization.

51398112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 264 counting only the distinct ones).

The product of its digits is 2160, while the sum is 30.

The square root of 51398112 is about 7169.2476592736. The cubic root of 51398112 is about 371.8054248955.

The spelling of 51398112 in words is "fifty-one million, three hundred ninety-eight thousand, one hundred twelve".