83821151 has 2 divisors, whose sum is σ = 83821152. Its totient is φ = 83821150.

The previous prime is 83821093. The next prime is 83821159. The reversal of 83821151 is 15112838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83821151 - 2¹⁴ = 83804767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83821159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41910575 + 41910576.

It is an arithmetic number, because the mean of its divisors is an integer number (41910576).

Almost surely, 2^83821151 is an apocalyptic number.

83821151 is a deficient number, since it is larger than the sum of its proper divisors (1).

83821151 is an equidigital number, since it uses as much as digits as its factorization.

83821151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 29.

The square root of 83821151 is about 9155.3891779651. The cubic root of 83821151 is about 437.6408706634.

Adding to 83821151 its reverse (15112838), we get a palindrome (98933989).

The spelling of 83821151 in words is "eighty-three million, eight hundred twenty-one thousand, one hundred fifty-one".