51145512 has 64 divisors (see below), whose sum is σ = 140520960. Its totient is φ = 15384000.

The previous prime is 51145499. The next prime is 51145519. The reversal of 51145512 is 21554115.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (51145519) by changing a digit.

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, 39223 + ... + 40505.

It is an arithmetic number, because the mean of its divisors is an integer number (2195640).

Almost surely, 2^51145512 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 51145512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70260480).

51145512 is an abundant number, since it is smaller than the sum of its proper divisors (89375448).

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

51145512 is a wasteful number, since it uses less digits than its factorization.

51145512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454 (or 1450 counting only the distinct ones).

The product of its digits is 1000, while the sum is 24.

The square root of 51145512 is about 7151.6090497174. The cubic root of 51145512 is about 371.1953355104.

Adding to 51145512 its reverse (21554115), we get a palindrome (72699627).

The spelling of 51145512 in words is "fifty-one million, one hundred forty-five thousand, five hundred twelve".