81431483 has 12 divisors (see below), whose sum is σ = 95156712. Its totient is φ = 69481440.

The previous prime is 81431447. The next prime is 81431509. The reversal of 81431483 is 38413418.

It is not a de Polignac number, because 81431483 - 2⁶ = 81431419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81431183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7463 + ... + 14783.

It is an arithmetic number, because the mean of its divisors is an integer number (7929726).

Almost surely, 2^81431483 is an apocalyptic number.

81431483 is a deficient number, since it is larger than the sum of its proper divisors (13725229).

81431483 is a wasteful number, since it uses less digits than its factorization.

81431483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7562 (or 7555 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 81431483 is about 9023.9394390698. The cubic root of 81431483 is about 433.4417901439.

The spelling of 81431483 in words is "eighty-one million, four hundred thirty-one thousand, four hundred eighty-three".