81053 has 4 divisors (see below), whose sum is σ = 92640. Its totient is φ = 69468.

The previous prime is 81049. The next prime is 81071. The reversal of 81053 is 35018.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35018 = 2 ⋅17509.

It is not a de Polignac number, because 81053 - 2² = 81049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5783 + ... + 5796.

It is an arithmetic number, because the mean of its divisors is an integer number (23160).

2⁸¹⁰⁵³ is an apocalyptic number.

It is an amenable number.

81053 is a deficient number, since it is larger than the sum of its proper divisors (11587).

81053 is a wasteful number, since it uses less digits than its factorization.

81053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11586.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 81053 is about 284.6980856978. The cubic root of 81053 is about 43.2769219933.

The spelling of 81053 in words is "eighty-one thousand, fifty-three".