51151144 has 16 divisors (see below), whose sum is σ = 104627520. Its totient is φ = 23250480.

The previous prime is 51151129. The next prime is 51151153. The reversal of 51151144 is 44115115.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290544 + ... + 290719.

It is an arithmetic number, because the mean of its divisors is an integer number (6539220).

Almost surely, 2^51151144 is an apocalyptic number.

It is an amenable number.

51151144 is an abundant number, since it is smaller than the sum of its proper divisors (53476376).

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

51151144 is a wasteful number, since it uses less digits than its factorization.

51151144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581280 (or 581276 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 51151144 is about 7152.0027964200. The cubic root of 51151144 is about 371.2089600059.

Adding to 51151144 its reverse (44115115), we get a palindrome (95266259).

The spelling of 51151144 in words is "fifty-one million, one hundred fifty-one thousand, one hundred forty-four".