51931260 has 96 divisors (see below), whose sum is σ = 171097920. Its totient is φ = 13031424.

The previous prime is 51931259. The next prime is 51931267. The reversal of 51931260 is 6213915.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51931267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6352 + ... + 12008.

It is an arithmetic number, because the mean of its divisors is an integer number (1782270).

Almost surely, 2^51931260 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 51931260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85548960).

51931260 is an abundant number, since it is smaller than the sum of its proper divisors (119166660).

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

51931260 is a wasteful number, since it uses less digits than its factorization.

51931260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5692 (or 5684 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 51931260 is about 7206.3347132922. The cubic root of 51931260 is about 373.0865734019.

The spelling of 51931260 in words is "fifty-one million, nine hundred thirty-one thousand, two hundred sixty".