51069936 has 80 divisors (see below), whose sum is σ = 138991104. Its totient is φ = 16127232.

The previous prime is 51069911. The next prime is 51069937. The reversal of 51069936 is 63996015.

It is a junction number, because it is equal to n+sod(n) for n = 51069894 and 51069903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51069937) 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, 184230 + ... + 184506.

Almost surely, 2^51069936 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 51069936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69495552).

51069936 is an abundant number, since it is smaller than the sum of its proper divisors (87921168).

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

51069936 is a wasteful number, since it uses less digits than its factorization.

51069936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 51069936 is about 7146.3232504554. The cubic root of 51069936 is about 371.0124110998.

The spelling of 51069936 in words is "fifty-one million, sixty-nine thousand, nine hundred thirty-six".