81483319 has 4 divisors (see below), whose sum is σ = 85026096. Its totient is φ = 77940544.

The previous prime is 81483293. The next prime is 81483331. The reversal of 81483319 is 91338418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91338418 = 2 ⋅45669209.

It is a cyclic number.

It is not a de Polignac number, because 81483319 - 2¹⁷ = 81352247 is a prime.

It is a super-2 number, since 2×81483319² = 13279062550511522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81483119) 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, 1771354 + ... + 1771399.

It is an arithmetic number, because the mean of its divisors is an integer number (21256524).

Almost surely, 2^81483319 is an apocalyptic number.

81483319 is a deficient number, since it is larger than the sum of its proper divisors (3542777).

81483319 is a wasteful number, since it uses less digits than its factorization.

81483319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3542776.

The product of its digits is 20736, while the sum is 37.

The square root of 81483319 is about 9026.8111202129. The cubic root of 81483319 is about 433.5337411605.

The spelling of 81483319 in words is "eighty-one million, four hundred eighty-three thousand, three hundred nineteen".