51513523 has 8 divisors (see below), whose sum is σ = 52080336. Its totient is φ = 50949600.

The previous prime is 51513433. The next prime is 51513533. The reversal of 51513523 is 32531515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51513523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51513533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59965 + ... + 60817.

It is an arithmetic number, because the mean of its divisors is an integer number (6510042).

Almost surely, 2^51513523 is an apocalyptic number.

51513523 is a deficient number, since it is larger than the sum of its proper divisors (566813).

51513523 is a wasteful number, since it uses less digits than its factorization.

51513523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445.

The product of its digits is 2250, while the sum is 25.

The square root of 51513523 is about 7177.2921774162. The cubic root of 51513523 is about 372.0835048789.

The spelling of 51513523 in words is "fifty-one million, five hundred thirteen thousand, five hundred twenty-three".