51613760 has 168 divisors, whose sum is σ = 142695168. Its totient is φ = 17740800.

The previous prime is 51613759. The next prime is 51613777. The reversal of 51613760 is 6731615.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1200299 + ... + 1200341.

It is an arithmetic number, because the mean of its divisors is an integer number (849376).

Almost surely, 2^51613760 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 51613760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71347584).

51613760 is an abundant number, since it is smaller than the sum of its proper divisors (91081408).

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

51613760 is a wasteful number, since it uses less digits than its factorization.

51613760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 51613760 is about 7184.2717097838. The cubic root of 51613760 is about 372.3246866580.

The spelling of 51613760 in words is "fifty-one million, six hundred thirteen thousand, seven hundred sixty".