81546201 has 48 divisors (see below), whose sum is σ = 136581120. Its totient is φ = 46395360.

The previous prime is 81546193. The next prime is 81546239. The reversal of 81546201 is 10264518.

It is not a de Polignac number, because 81546201 - 2³ = 81546193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81546001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134040 + ... + 134646.

It is an arithmetic number, because the mean of its divisors is an integer number (2845440).

Almost surely, 2^81546201 is an apocalyptic number.

It is an amenable number.

81546201 is a deficient number, since it is larger than the sum of its proper divisors (55034919).

81546201 is a wasteful number, since it uses less digits than its factorization.

81546201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 81546201 is about 9030.2935168244. The cubic root of 81546201 is about 433.6452341603.

The spelling of 81546201 in words is "eighty-one million, five hundred forty-six thousand, two hundred one".