81835053 has 4 divisors (see below), whose sum is σ = 109113408. Its totient is φ = 54556700.

The previous prime is 81835049. The next prime is 81835069. The reversal of 81835053 is 35053818.

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 81835053 - 2² = 81835049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81835043) 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, 13639173 + ... + 13639178.

It is an arithmetic number, because the mean of its divisors is an integer number (27278352).

Almost surely, 2^81835053 is an apocalyptic number.

It is an amenable number.

81835053 is a deficient number, since it is larger than the sum of its proper divisors (27278355).

81835053 is a wasteful number, since it uses less digits than its factorization.

81835053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27278354.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 81835053 is about 9046.2728789264. The cubic root of 81835053 is about 434.1566484860.

The spelling of 81835053 in words is "eighty-one million, eight hundred thirty-five thousand, fifty-three".