83144821 has 8 divisors (see below), whose sum is σ = 85932288. Its totient is φ = 80364000.

The previous prime is 83144819. The next prime is 83144837. The reversal of 83144821 is 12844138.

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 83144821 - 2¹ = 83144819 is a prime.

It is a super-2 number, since 2×83144821² = 13826122518244082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83144801) 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, 45006 + ... + 46816.

It is an arithmetic number, because the mean of its divisors is an integer number (10741536).

Almost surely, 2^83144821 is an apocalyptic number.

It is an amenable number.

83144821 is a deficient number, since it is larger than the sum of its proper divisors (2787467).

83144821 is a wasteful number, since it uses less digits than its factorization.

83144821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323.

The product of its digits is 6144, while the sum is 31.

The square root of 83144821 is about 9118.3782000968. The cubic root of 83144821 is about 436.4606223173.

Adding to 83144821 its reverse (12844138), we get a palindrome (95988959).

The spelling of 83144821 in words is "eighty-three million, one hundred forty-four thousand, eight hundred twenty-one".