51493536 has 96 divisors (see below), whose sum is σ = 151865280. Its totient is φ = 16973568.

The previous prime is 51493487. The next prime is 51493549. The reversal of 51493536 is 63539415.

51493536 is a `hidden beast` number, since 514 + 93 + 53 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51493536.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92170 + ... + 92726.

It is an arithmetic number, because the mean of its divisors is an integer number (1581930).

Almost surely, 2^51493536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51493536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75932640).

51493536 is an abundant number, since it is smaller than the sum of its proper divisors (100371744).

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

51493536 is a wasteful number, since it uses less digits than its factorization.

51493536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 669 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 51493536 is about 7175.8996648504. The cubic root of 51493536 is about 372.0353764484.

The spelling of 51493536 in words is "fifty-one million, four hundred ninety-three thousand, five hundred thirty-six".