51515134 has 32 divisors (see below), whose sum is σ = 89867232. Its totient is φ = 21888000.

The previous prime is 51515129. The next prime is 51515159. The reversal of 51515134 is 43151515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51515099 and 51515108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67314 + ... + 68074.

It is an arithmetic number, because the mean of its divisors is an integer number (2808351).

Almost surely, 2^51515134 is an apocalyptic number.

51515134 is a deficient number, since it is larger than the sum of its proper divisors (38352098).

51515134 is a wasteful number, since it uses less digits than its factorization.

51515134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its digits is 1500, while the sum is 25.

The square root of 51515134 is about 7177.4044054937. The cubic root of 51515134 is about 372.0873836033.

Adding to 51515134 its reverse (43151515), we get a palindrome (94666649).

The spelling of 51515134 in words is "fifty-one million, five hundred fifteen thousand, one hundred thirty-four".