83195551 has 2 divisors, whose sum is σ = 83195552. Its totient is φ = 83195550.

The previous prime is 83195549. The next prime is 83195561. The reversal of 83195551 is 15559138.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83195551 - 2¹ = 83195549 is a prime.

Together with 83195549, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 83195551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83195561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41597775 + 41597776.

It is an arithmetic number, because the mean of its divisors is an integer number (41597776).

Almost surely, 2^83195551 is an apocalyptic number.

83195551 is a deficient number, since it is larger than the sum of its proper divisors (1).

83195551 is an equidigital number, since it uses as much as digits as its factorization.

83195551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 37.

The square root of 83195551 is about 9121.1595205873. The cubic root of 83195551 is about 436.5493716644.

The spelling of 83195551 in words is "eighty-three million, one hundred ninety-five thousand, five hundred fifty-one".