81592925 has 12 divisors (see below), whose sum is σ = 101514336. Its totient is φ = 65055600.

The previous prime is 81592919. The next prime is 81592933. The reversal of 81592925 is 52929518.

It is not a de Polignac number, because 81592925 - 2¹⁴ = 81576541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2360 + ... + 12990.

It is an arithmetic number, because the mean of its divisors is an integer number (8459528).

Almost surely, 2^81592925 is an apocalyptic number.

It is an amenable number.

81592925 is a deficient number, since it is larger than the sum of its proper divisors (19921411).

81592925 is a wasteful number, since it uses less digits than its factorization.

81592925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10948 (or 10943 counting only the distinct ones).

The product of its digits is 64800, while the sum is 41.

The square root of 81592925 is about 9032.8802161880. The cubic root of 81592925 is about 433.7280410889.

The spelling of 81592925 in words is "eighty-one million, five hundred ninety-two thousand, nine hundred twenty-five".