53386781 has 8 divisors (see below), whose sum is σ = 61057920. Its totient is φ = 45726768.

The previous prime is 53386777. The next prime is 53386793. The reversal of 53386781 is 18768335.

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 53386781 - 2² = 53386777 is a prime.

It is a super-2 number, since 2×53386781² = 5700296771083922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53386721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15800 + ... + 18878.

It is an arithmetic number, because the mean of its divisors is an integer number (7632240).

Almost surely, 2^53386781 is an apocalyptic number.

It is an amenable number.

53386781 is a deficient number, since it is larger than the sum of its proper divisors (7671139).

53386781 is a wasteful number, since it uses less digits than its factorization.

53386781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563.

The product of its digits is 120960, while the sum is 41.

The square root of 53386781 is about 7306.6258286572. The cubic root of 53386781 is about 376.5401100224.

The spelling of 53386781 in words is "fifty-three million, three hundred eighty-six thousand, seven hundred eighty-one".