51159636 has 144 divisors (see below), whose sum is σ = 151901568. Its totient is φ = 14361600.

The previous prime is 51159617. The next prime is 51159649. The reversal of 51159636 is 63695115.

51159636 is a `hidden beast` number, since 5 + 1 + 15 + 9 + 636 = 666.

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 51159636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 373360 + ... + 373496.

It is an arithmetic number, because the mean of its divisors is an integer number (1054872).

Almost surely, 2^51159636 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 51159636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75950784).

51159636 is an abundant number, since it is smaller than the sum of its proper divisors (100741932).

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

51159636 is a wasteful number, since it uses less digits than its factorization.

51159636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 217 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 51159636 is about 7152.5964516391. The cubic root of 51159636 is about 371.2295012999.

The spelling of 51159636 in words is "fifty-one million, one hundred fifty-nine thousand, six hundred thirty-six".