51130513 has 4 divisors (see below), whose sum is σ = 58434880. Its totient is φ = 43826148.

The previous prime is 51130507. The next prime is 51130529. The reversal of 51130513 is 31503115.

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 51130513 - 2⁵ = 51130481 is a prime.

It is a super-2 number, since 2×51130513² = 5228658719286338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51130613) 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, 3652173 + ... + 3652186.

It is an arithmetic number, because the mean of its divisors is an integer number (14608720).

Almost surely, 2^51130513 is an apocalyptic number.

It is an amenable number.

51130513 is a deficient number, since it is larger than the sum of its proper divisors (7304367).

51130513 is an equidigital number, since it uses as much as digits as its factorization.

51130513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304366.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 51130513 is about 7150.5603276946. The cubic root of 51130513 is about 371.1590462189.

Adding to 51130513 its reverse (31503115), we get a palindrome (82633628).

It can be divided in two parts, 5 and 1130513, that multiplied together give a palindrome (5652565).

The spelling of 51130513 in words is "fifty-one million, one hundred thirty thousand, five hundred thirteen".