51188536 has 48 divisors (see below), whose sum is σ = 113373000. Its totient is φ = 21599424.

The previous prime is 51188519. The next prime is 51188537. The reversal of 51188536 is 63588115.

It is a junction number, because it is equal to n+sod(n) for n = 51188495 and 51188504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51188537) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 25290 + ... + 27238.

Almost surely, 2^51188536 is an apocalyptic number.

51188536 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51188536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56686500).

51188536 is an abundant number, since it is smaller than the sum of its proper divisors (62184464).

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

51188536 is a wasteful number, since it uses less digits than its factorization.

51188536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 2025 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The square root of 51188536 is about 7154.6164118001. The cubic root of 51188536 is about 371.2993904670.

The spelling of 51188536 in words is "fifty-one million, one hundred eighty-eight thousand, five hundred thirty-six".