51143004 has 144 divisors (see below), whose sum is σ = 152845056. Its totient is φ = 14246400.

The previous prime is 51142999. The next prime is 51143011. The reversal of 51143004 is 40034115.

It is a happy number.

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

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 477919 + ... + 478025.

It is an arithmetic number, because the mean of its divisors is an integer number (1061424).

Almost surely, 2^51143004 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 51143004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76422528).

51143004 is an abundant number, since it is smaller than the sum of its proper divisors (101702052).

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

51143004 is a wasteful number, since it uses less digits than its factorization.

51143004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51143004 is about 7151.4337024124. The cubic root of 51143004 is about 371.1892680304.

Adding to 51143004 its reverse (40034115), we get a palindrome (91177119).

Subtracting from 51143004 its reverse (40034115), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 5114 and 3004, that added together give a palindrome (8118).

The spelling of 51143004 in words is "fifty-one million, one hundred forty-three thousand, four".