51218010 has 96 divisors (see below), whose sum is σ = 140849280. Its totient is φ = 12887424.

The previous prime is 51217993. The next prime is 51218021. The reversal of 51218010 is 1081215.

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

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, 225517 + ... + 225743.

It is an arithmetic number, because the mean of its divisors is an integer number (1467180).

Almost surely, 2^51218010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51218010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70424640).

51218010 is an abundant number, since it is smaller than the sum of its proper divisors (89631270).

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

51218010 is a wasteful number, since it uses less digits than its factorization.

51218010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 51218010 is about 7156.6759043567. The cubic root of 51218010 is about 371.3706406552.

Adding to 51218010 its reverse (1081215), we get a palindrome (52299225).

It can be divided in two parts, 5121 and 8010, that added together give a palindrome (13131).

The spelling of 51218010 in words is "fifty-one million, two hundred eighteen thousand, ten".