81270955 has 8 divisors (see below), whose sum is σ = 97952400. Its totient is φ = 64731936.

The previous prime is 81270953. The next prime is 81270977. The reversal of 81270955 is 55907218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81270955 - 2¹ = 81270953 is a prime.

It is a super-2 number, since 2×81270955² = 13209936253224050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81270953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34345 + ... + 36634.

It is an arithmetic number, because the mean of its divisors is an integer number (12244050).

Almost surely, 2^81270955 is an apocalyptic number.

81270955 is a deficient number, since it is larger than the sum of its proper divisors (16681445).

81270955 is a wasteful number, since it uses less digits than its factorization.

81270955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71213.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 81270955 is about 9015.0404879845. The cubic root of 81270955 is about 433.1567844246.

The spelling of 81270955 in words is "eighty-one million, two hundred seventy thousand, nine hundred fifty-five".