51969960 has 192 divisors, whose sum is σ = 198132480. Its totient is φ = 11566080.

The previous prime is 51969887. The next prime is 51969961. The reversal of 51969960 is 6996915.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (51969961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103069 + ... + 103571.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 2^51969960 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 51969960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

51969960 is an abundant number, since it is smaller than the sum of its proper divisors (146162520).

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

51969960 is a wasteful number, since it uses less digits than its factorization.

51969960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 51969960 is about 7209.0193507855. The cubic root of 51969960 is about 373.1792270707.

The spelling of 51969960 in words is "fifty-one million, nine hundred sixty-nine thousand, nine hundred sixty".