51357516 has 48 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 14572800.

The previous prime is 51357499. The next prime is 51357533. The reversal of 51357516 is 61575315.

It is an interprime number because it is at equal distance from previous prime (51357499) and next prime (51357533).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10660 + ... + 14708.

It is an arithmetic number, because the mean of its divisors is an integer number (2872800).

Almost surely, 2^51357516 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 51357516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68947200).

51357516 is an abundant number, since it is smaller than the sum of its proper divisors (86536884).

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

51357516 is a wasteful number, since it uses less digits than its factorization.

51357516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214 (or 4212 counting only the distinct ones).

The product of its digits is 15750, while the sum is 33.

The square root of 51357516 is about 7166.4158405719. The cubic root of 51357516 is about 371.7075108667.

It can be divided in two parts, 513575 and 16, that added together give a triangular number (513591 = T₁₀₁₃).

The spelling of 51357516 in words is "fifty-one million, three hundred fifty-seven thousand, five hundred sixteen".