81250253 has 4 divisors (see below), whose sum is σ = 92857440. Its totient is φ = 69643068.

The previous prime is 81250229. The next prime is 81250303. The reversal of 81250253 is 35205218.

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 81250253 - 2⁸ = 81249997 is a prime.

It is a super-2 number, since 2×81250253² = 13203207225128018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81250153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5803583 + ... + 5803596.

It is an arithmetic number, because the mean of its divisors is an integer number (23214360).

Almost surely, 2^81250253 is an apocalyptic number.

It is an amenable number.

81250253 is a deficient number, since it is larger than the sum of its proper divisors (11607187).

81250253 is a wasteful number, since it uses less digits than its factorization.

81250253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11607186.

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

The square root of 81250253 is about 9013.8922225640. The cubic root of 81250253 is about 433.1200022259.

The spelling of 81250253 in words is "eighty-one million, two hundred fifty thousand, two hundred fifty-three".