51819135 has 16 divisors (see below), whose sum is σ = 85585920. Its totient is φ = 26745120.

The previous prime is 51819133. The next prime is 51819139. The reversal of 51819135 is 53191815.

It is not a de Polignac number, because 51819135 - 2¹ = 51819133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51819096 and 51819105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51819133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55255 + ... + 56184.

It is an arithmetic number, because the mean of its divisors is an integer number (5349120).

Almost surely, 2^51819135 is an apocalyptic number.

51819135 is a deficient number, since it is larger than the sum of its proper divisors (33766785).

51819135 is a wasteful number, since it uses less digits than its factorization.

51819135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111478.

The product of its digits is 5400, while the sum is 33.

The square root of 51819135 is about 7198.5508958401. The cubic root of 51819135 is about 372.8178689967.

The spelling of 51819135 in words is "fifty-one million, eight hundred nineteen thousand, one hundred thirty-five".