51502164 has 72 divisors (see below), whose sum is σ = 140575680. Its totient is φ = 14374272.

The previous prime is 51502159. The next prime is 51502169. The reversal of 51502164 is 46120515.

It is an interprime number because it is at equal distance from previous prime (51502159) and next prime (51502169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51502169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 578632 + ... + 578720.

It is an arithmetic number, because the mean of its divisors is an integer number (1952440).

Almost surely, 2^51502164 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 51502164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70287840).

51502164 is an abundant number, since it is smaller than the sum of its proper divisors (89073516).

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

51502164 is a wasteful number, since it uses less digits than its factorization.

51502164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51502164 is about 7176.5008186441. The cubic root of 51502164 is about 372.0561540852.

Adding to 51502164 its reverse (46120515), we get a palindrome (97622679).

The spelling of 51502164 in words is "fifty-one million, five hundred two thousand, one hundred sixty-four".