83231281 has 4 divisors (see below), whose sum is σ = 95121472. Its totient is φ = 71341092.

The previous prime is 83231257. The next prime is 83231293. The reversal of 83231281 is 18213238.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83231281 - 2¹³ = 83223089 is a prime.

It is a super-2 number, since 2×83231281² = 13854892273801922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83231081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5945085 + ... + 5945098.

It is an arithmetic number, because the mean of its divisors is an integer number (23780368).

Almost surely, 2^83231281 is an apocalyptic number.

It is an amenable number.

83231281 is a deficient number, since it is larger than the sum of its proper divisors (11890191).

83231281 is a wasteful number, since it uses less digits than its factorization.

83231281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11890190.

The product of its digits is 2304, while the sum is 28.

The square root of 83231281 is about 9123.1179428965. The cubic root of 83231281 is about 436.6118576845.

It can be divided in two parts, 8323 and 1281, that added together give a square (9604 = 98²).

The spelling of 83231281 in words is "eighty-three million, two hundred thirty-one thousand, two hundred eighty-one".