81480201 has 32 divisors (see below), whose sum is σ = 127598976. Its totient is φ = 45696000.

The previous prime is 81480193. The next prime is 81480209. The reversal of 81480201 is 10208418.

It is an interprime number because it is at equal distance from previous prime (81480193) and next prime (81480209).

It is not a de Polignac number, because 81480201 - 2³ = 81480193 is a prime.

It is a super-3 number, since 3×81480201³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (81480209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33031 + ... + 35411.

It is an arithmetic number, because the mean of its divisors is an integer number (3987468).

Almost surely, 2^81480201 is an apocalyptic number.

It is an amenable number.

81480201 is a deficient number, since it is larger than the sum of its proper divisors (46118775).

81480201 is a wasteful number, since it uses less digits than its factorization.

81480201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 81480201 is about 9026.6384108371. The cubic root of 81480201 is about 433.5282112947.

Adding to 81480201 its reverse (10208418), we get a palindrome (91688619).

The spelling of 81480201 in words is "eighty-one million, four hundred eighty thousand, two hundred one".