51135504 has 40 divisors (see below), whose sum is σ = 150972480. Its totient is φ = 14610048.

The previous prime is 51135499. The next prime is 51135529. The reversal of 51135504 is 40553115.

It is a super-2 number, since 2×51135504² = 5229679538668032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75759 + ... + 76430.

It is an arithmetic number, because the mean of its divisors is an integer number (3774312).

Almost surely, 2^51135504 is an apocalyptic number.

It is an amenable number.

51135504 is an abundant number, since it is smaller than the sum of its proper divisors (99836976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51135504 is a wasteful number, since it uses less digits than its factorization.

51135504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152207 (or 152201 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51135504 is about 7150.9093128077. The cubic root of 51135504 is about 371.1711224686.

Adding to 51135504 its reverse (40553115), we get a palindrome (91688619).

The spelling of 51135504 in words is "fifty-one million, one hundred thirty-five thousand, five hundred four".