81052253 has 8 divisors (see below), whose sum is σ = 86011200. Its totient is φ = 76212928.

The previous prime is 81052229. The next prime is 81052261. The reversal of 81052253 is 35225018.

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 81052253 - 2¹⁴ = 81035869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81052553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28508 + ... + 31221.

It is an arithmetic number, because the mean of its divisors is an integer number (10751400).

Almost surely, 2^81052253 is an apocalyptic number.

It is an amenable number.

81052253 is a deficient number, since it is larger than the sum of its proper divisors (4958947).

81052253 is a wasteful number, since it uses less digits than its factorization.

81052253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59811.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 81052253 is about 9002.9024764239. The cubic root of 81052253 is about 432.7678904346.

The spelling of 81052253 in words is "eighty-one million, fifty-two thousand, two hundred fifty-three".