51719136 has 48 divisors (see below), whose sum is σ = 155159424. Its totient is φ = 14776704.

The previous prime is 51719131. The next prime is 51719137. The reversal of 51719136 is 63191715.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 51719097 and 51719106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51719131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37810 + ... + 39153.

It is an arithmetic number, because the mean of its divisors is an integer number (3232488).

Almost surely, 2^51719136 is an apocalyptic number.

51719136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51719136 is an abundant number, since it is smaller than the sum of its proper divisors (103440288).

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

51719136 is a wasteful number, since it uses less digits than its factorization.

51719136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76983 (or 76975 counting only the distinct ones).

The product of its digits is 5670, while the sum is 33.

The square root of 51719136 is about 7191.6017687300. The cubic root of 51719136 is about 372.5778970163.

The spelling of 51719136 in words is "fifty-one million, seven hundred nineteen thousand, one hundred thirty-six".