53781081 has 8 divisors (see below), whose sum is σ = 75926304. Its totient is φ = 33744960.

The previous prime is 53781059. The next prime is 53781083. The reversal of 53781081 is 18018735.

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

It is not a de Polignac number, because 53781081 - 2⁷ = 53780953 is a prime.

It is a super-2 number, since 2×53781081² = 5784809347057122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53781083) 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, 527215 + ... + 527316.

It is an arithmetic number, because the mean of its divisors is an integer number (9490788).

Almost surely, 2^53781081 is an apocalyptic number.

53781081 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

53781081 is a deficient number, since it is larger than the sum of its proper divisors (22145223).

53781081 is a wasteful number, since it uses less digits than its factorization.

53781081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054551.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 53781081 is about 7333.5585495720. The cubic root of 53781081 is about 377.4648441743.

It can be divided in two parts, 537 and 81081, that added together give a palindrome (81618).

The spelling of 53781081 in words is "fifty-three million, seven hundred eighty-one thousand, eighty-one".