51513461 has 4 divisors (see below), whose sum is σ = 51558624. Its totient is φ = 51468300.

The previous prime is 51513433. The next prime is 51513533. The reversal of 51513461 is 16431515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51513461 - 2¹⁰ = 51512437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51513461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20825 + ... + 23166.

It is an arithmetic number, because the mean of its divisors is an integer number (12889656).

Almost surely, 2^51513461 is an apocalyptic number.

It is an amenable number.

51513461 is a deficient number, since it is larger than the sum of its proper divisors (45163).

51513461 is a wasteful number, since it uses less digits than its factorization.

51513461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45162.

The product of its digits is 1800, while the sum is 26.

The square root of 51513461 is about 7177.2878582373. The cubic root of 51513461 is about 372.0833556030.

Adding to 51513461 its reverse (16431515), we get a palindrome (67944976).

The spelling of 51513461 in words is "fifty-one million, five hundred thirteen thousand, four hundred sixty-one".