51152513 has 2 divisors, whose sum is σ = 51152514. Its totient is φ = 51152512.

The previous prime is 51152489. The next prime is 51152551. The reversal of 51152513 is 31525115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50523664 + 628849 = 7108^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 51152513 - 2²² = 46958209 is a prime.

It is a Chen prime.

It is equal to p_3066044 and since 51152513 and 3066044 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51152593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25576256 + 25576257.

It is an arithmetic number, because the mean of its divisors is an integer number (25576257).

Almost surely, 2^51152513 is an apocalyptic number.

It is an amenable number.

51152513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51152513 is an equidigital number, since it uses as much as digits as its factorization.

51152513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 750, while the sum is 23.

The square root of 51152513 is about 7152.0985032367. The cubic root of 51152513 is about 371.2122716330.

Adding to 51152513 its reverse (31525115), we get a palindrome (82677628).

The spelling of 51152513 in words is "fifty-one million, one hundred fifty-two thousand, five hundred thirteen".