81357014227 has 4 divisors (see below), whose sum is σ = 81622021096. Its totient is φ = 81092007360.

The previous prime is 81357014209. The next prime is 81357014287. The reversal of 81357014227 is 72241075318.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72241075318 = 2 ⋅36120537659.

It is a cyclic number.

It is not a de Polignac number, because 81357014227 - 2³¹ = 79209530579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81357014227.

It is not an unprimeable number, because it can be changed into a prime (81357014287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132502974 + ... + 132503587.

It is an arithmetic number, because the mean of its divisors is an integer number (20405505274).

Almost surely, 2^81357014227 is an apocalyptic number.

81357014227 is a deficient number, since it is larger than the sum of its proper divisors (265006869).

81357014227 is a wasteful number, since it uses less digits than its factorization.

81357014227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265006868.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 81357014227 in words is "eighty-one billion, three hundred fifty-seven million, fourteen thousand, two hundred twenty-seven".