81469325 has 24 divisors (see below), whose sum is σ = 116540160. Its totient is φ = 55339200.

The previous prime is 81469319. The next prime is 81469351. The reversal of 81469325 is 52396418.

It is a happy number.

It is not a de Polignac number, because 81469325 - 2⁴ = 81469309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16940 + ... + 21210.

It is an arithmetic number, because the mean of its divisors is an integer number (4855840).

Almost surely, 2^81469325 is an apocalyptic number.

It is an amenable number.

81469325 is a deficient number, since it is larger than the sum of its proper divisors (35070835).

81469325 is a wasteful number, since it uses less digits than its factorization.

81469325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397 (or 4392 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 81469325 is about 9026.0359516235. The cubic root of 81469325 is about 433.5089212808.

It can be divided in two parts, 8146 and 9325, that added together give a palindrome (17471).

The spelling of 81469325 in words is "eighty-one million, four hundred sixty-nine thousand, three hundred twenty-five".