81020224337 has 8 divisors (see below), whose sum is σ = 87274845504. Its totient is φ = 74768788368.

The previous prime is 81020224283. The next prime is 81020224343. The reversal of 81020224337 is 73342202018.

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 81020224337 - 2³⁰ = 79946482513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81020224037) 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, 743333 + ... + 845330.

It is an arithmetic number, because the mean of its divisors is an integer number (10909355688).

Almost surely, 2^81020224337 is an apocalyptic number.

It is an amenable number.

81020224337 is a deficient number, since it is larger than the sum of its proper divisors (6254621167).

81020224337 is a wasteful number, since it uses less digits than its factorization.

81020224337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592599.

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 81020224337 in words is "eighty-one billion, twenty million, two hundred twenty-four thousand, three hundred thirty-seven".