51388260 has 192 divisors, whose sum is σ = 183859200. Its totient is φ = 10631040.

The previous prime is 51388247. The next prime is 51388273. The reversal of 51388260 is 6288315.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51388247) and next prime (51388273).

It is a Harshad number since it is a multiple of its sum of digits (33).

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 63 ways as a sum of consecutive naturals, for example, 226267 + ... + 226493.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^51388260 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 51388260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91929600).

51388260 is an abundant number, since it is smaller than the sum of its proper divisors (132470940).

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

51388260 is a wasteful number, since it uses less digits than its factorization.

51388260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 51388260 is about 7168.5605249590. The cubic root of 51388260 is about 371.7816674656.

The spelling of 51388260 in words is "fifty-one million, three hundred eighty-eight thousand, two hundred sixty".