51210264 has 64 divisors (see below), whose sum is σ = 151050240. Its totient is φ = 14158080.

The previous prime is 51210251. The next prime is 51210281. The reversal of 51210264 is 46201215.

It is a super-2 number, since 2×51210264² = 5244982277899392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 51210264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292 + ... + 10124.

It is an arithmetic number, because the mean of its divisors is an integer number (2360160).

Almost surely, 2^51210264 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 51210264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75525120).

51210264 is an abundant number, since it is smaller than the sum of its proper divisors (99839976).

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

51210264 is a wasteful number, since it uses less digits than its factorization.

51210264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9880 (or 9876 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 51210264 is about 7156.1347108617. The cubic root of 51210264 is about 371.3519181914.

Adding to 51210264 its reverse (46201215), we get a palindrome (97411479).

The spelling of 51210264 in words is "fifty-one million, two hundred ten thousand, two hundred sixty-four".