81725350 has 48 divisors (see below), whose sum is σ = 175488768. Its totient is φ = 27735840.

The previous prime is 81725323. The next prime is 81725351. The reversal of 81725350 is 5352718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81725351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34917 + ... + 37183.

It is an arithmetic number, because the mean of its divisors is an integer number (3656016).

Almost surely, 2^81725350 is an apocalyptic number.

81725350 is an abundant number, since it is smaller than the sum of its proper divisors (93763418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81725350 is a wasteful number, since it uses less digits than its factorization.

81725350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389 (or 2384 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 81725350 is about 9040.2074091251. The cubic root of 81725350 is about 433.9625605680.

The spelling of 81725350 in words is "eighty-one million, seven hundred twenty-five thousand, three hundred fifty".