51782742 has 24 divisors (see below), whose sum is σ = 122396040. Its totient is φ = 15691680.

The previous prime is 51782737. The next prime is 51782743. The reversal of 51782742 is 24728715.

It is a junction number, because it is equal to n+sod(n) for n = 51782697 and 51782706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51782743) 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, 130567 + ... + 130962.

It is an arithmetic number, because the mean of its divisors is an integer number (5099835).

Almost surely, 2^51782742 is an apocalyptic number.

51782742 is an abundant number, since it is smaller than the sum of its proper divisors (70613298).

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

51782742 is a wasteful number, since it uses less digits than its factorization.

51782742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261548 (or 261545 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 51782742 is about 7196.0226514374. The cubic root of 51782742 is about 372.7305708828.

The spelling of 51782742 in words is "fifty-one million, seven hundred eighty-two thousand, seven hundred forty-two".