53781543 has 16 divisors (see below), whose sum is σ = 80575200. Its totient is φ = 35449920.

The previous prime is 53781491. The next prime is 53781547. The reversal of 53781543 is 34518735.

53781543 is a `hidden beast` number, since 5 + 37 + 81 + 543 = 666.

It is not a de Polignac number, because 53781543 - 2⁶ = 53781479 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 53781498 and 53781507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53781547) 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, 8788 + ... + 13593.

It is an arithmetic number, because the mean of its divisors is an integer number (5035950).

Almost surely, 2^53781543 is an apocalyptic number.

53781543 is a deficient number, since it is larger than the sum of its proper divisors (26793657).

53781543 is a wasteful number, since it uses less digits than its factorization.

53781543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22479 (or 22473 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 53781543 is about 7333.5900485369. The cubic root of 53781543 is about 377.4659250269.

The spelling of 53781543 in words is "fifty-three million, seven hundred eighty-one thousand, five hundred forty-three".