51511113 has 8 divisors (see below), whose sum is σ = 76312800. Its totient is φ = 34340724.

The previous prime is 51511091. The next prime is 51511127. The reversal of 51511113 is 31111515.

It is not a de Polignac number, because 51511113 - 2⁶ = 51511049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51511133) 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, 953883 + ... + 953936.

It is an arithmetic number, because the mean of its divisors is an integer number (9539100).

Almost surely, 2^51511113 is an apocalyptic number.

It is an amenable number.

51511113 is a deficient number, since it is larger than the sum of its proper divisors (24801687).

51511113 is a wasteful number, since it uses less digits than its factorization.

51511113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907828 (or 1907822 counting only the distinct ones).

The product of its digits is 75, while the sum is 18.

The square root of 51511113 is about 7177.1242848372. The cubic root of 51511113 is about 372.0777022910.

Adding to 51511113 its reverse (31111515), we get a palindrome (82622628).

It can be divided in two parts, 515 and 11113, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 51511113 in words is "fifty-one million, five hundred eleven thousand, one hundred thirteen".