51513016 has 8 divisors (see below), whose sum is σ = 96586920. Its totient is φ = 25756504.

The previous prime is 51513013. The next prime is 51513023. The reversal of 51513016 is 61031515.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219556 + ... + 3219571.

It is an arithmetic number, because the mean of its divisors is an integer number (12073365).

Almost surely, 2^51513016 is an apocalyptic number.

It is an amenable number.

51513016 is a deficient number, since it is larger than the sum of its proper divisors (45073904).

51513016 is a wasteful number, since it uses less digits than its factorization.

51513016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6439133 (or 6439129 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51513016 is about 7177.2568576024. The cubic root of 51513016 is about 372.0822841835.

It can be divided in two parts, 515 and 13016, that added together give a palindrome (13531).

The spelling of 51513016 in words is "fifty-one million, five hundred thirteen thousand, sixteen".