51134720 has 144 divisors (see below), whose sum is σ = 151092480. Its totient is φ = 16146432.

The previous prime is 51134693. The next prime is 51134729. The reversal of 51134720 is 2743115.

It is a super-2 number, since 2×51134720² = 5229519178956800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51134729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116261 + ... + 116699.

Almost surely, 2^51134720 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 51134720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75546240).

51134720 is an abundant number, since it is smaller than the sum of its proper divisors (99957760).

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

51134720 is a wasteful number, since it uses less digits than its factorization.

51134720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51134720 is about 7150.8544943944. The cubic root of 51134720 is about 371.1692255502.

Adding to 51134720 its reverse (2743115), we get a palindrome (53877835).

The spelling of 51134720 in words is "fifty-one million, one hundred thirty-four thousand, seven hundred twenty".