53781457 has 8 divisors (see below), whose sum is σ = 58564800. Its totient is φ = 49193424.

The previous prime is 53781437. The next prime is 53781467. The reversal of 53781457 is 75418735.

53781457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53781457 - 2¹⁵ = 53748689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53781407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48253 + ... + 49354.

It is an arithmetic number, because the mean of its divisors is an integer number (7320600).

Almost surely, 2^53781457 is an apocalyptic number.

It is an amenable number.

53781457 is a deficient number, since it is larger than the sum of its proper divisors (4783343).

53781457 is a wasteful number, since it uses less digits than its factorization.

53781457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97655.

The product of its digits is 117600, while the sum is 40.

The square root of 53781457 is about 7333.5841851035. The cubic root of 53781457 is about 377.4657238297.

The spelling of 53781457 in words is "fifty-three million, seven hundred eighty-one thousand, four hundred fifty-seven".