81025053 has 8 divisors (see below), whose sum is σ = 109082688. Its totient is φ = 53492064.

The previous prime is 81025037. The next prime is 81025093. The reversal of 81025053 is 35052018.

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

It is not a de Polignac number, because 81025053 - 2⁴ = 81025037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81025033) 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, 130800 + ... + 131417.

It is an arithmetic number, because the mean of its divisors is an integer number (13635336).

Almost surely, 2^81025053 is an apocalyptic number.

It is an amenable number.

81025053 is a deficient number, since it is larger than the sum of its proper divisors (28057635).

81025053 is a wasteful number, since it uses less digits than its factorization.

81025053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262323.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 81025053 is about 9001.3917257277. The cubic root of 81025053 is about 432.7194747390.

The spelling of 81025053 in words is "eighty-one million, twenty-five thousand, fifty-three".