81472253 has 4 divisors (see below), whose sum is σ = 81499968. Its totient is φ = 81444540.

The previous prime is 81472243. The next prime is 81472267. The reversal of 81472253 is 35227418.

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 81472253 - 2⁶ = 81472189 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 (81472213) 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, 8843 + ... + 15528.

It is an arithmetic number, because the mean of its divisors is an integer number (20374992).

Almost surely, 2^81472253 is an apocalyptic number.

It is an amenable number.

81472253 is a deficient number, since it is larger than the sum of its proper divisors (27715).

81472253 is a wasteful number, since it uses less digits than its factorization.

81472253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27714.

The product of its digits is 13440, while the sum is 32.

The square root of 81472253 is about 9026.1981476145. The cubic root of 81472253 is about 433.5141146421.

The spelling of 81472253 in words is "eighty-one million, four hundred seventy-two thousand, two hundred fifty-three".