51787446 has 16 divisors (see below), whose sum is σ = 107146800. Its totient is φ = 16667168.

The previous prime is 51787429. The next prime is 51787493. The reversal of 51787446 is 64478715.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51787398 and 51787407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148641 + ... + 148988.

It is an arithmetic number, because the mean of its divisors is an integer number (6696675).

Almost surely, 2^51787446 is an apocalyptic number.

51787446 is an abundant number, since it is smaller than the sum of its proper divisors (55359354).

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

51787446 is a wasteful number, since it uses less digits than its factorization.

51787446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297663.

The product of its digits is 188160, while the sum is 42.

The square root of 51787446 is about 7196.3494912351. The cubic root of 51787446 is about 372.7418569564.

The spelling of 51787446 in words is "fifty-one million, seven hundred eighty-seven thousand, four hundred forty-six".