53778481 has 4 divisors (see below), whose sum is σ = 54922752. Its totient is φ = 52634212.

The previous prime is 53778469. The next prime is 53778523. The reversal of 53778481 is 18487735.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53778481 - 2¹³ = 53770289 is a prime.

It is a super-2 number, since 2×53778481² = 5784250037334722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53778401) 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 3 ways as a sum of consecutive naturals, for example, 572065 + ... + 572158.

It is an arithmetic number, because the mean of its divisors is an integer number (13730688).

Almost surely, 2^53778481 is an apocalyptic number.

It is an amenable number.

53778481 is a deficient number, since it is larger than the sum of its proper divisors (1144271).

53778481 is a wasteful number, since it uses less digits than its factorization.

53778481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144270.

The product of its digits is 188160, while the sum is 43.

The square root of 53778481 is about 7333.3812801463. The cubic root of 53778481 is about 377.4587613388.

The spelling of 53778481 in words is "fifty-three million, seven hundred seventy-eight thousand, four hundred eighty-one".