83905155 has 12 divisors (see below), whose sum is σ = 145435680. Its totient is φ = 44749392.

The previous prime is 83905141. The next prime is 83905163. The reversal of 83905155 is 55150938.

It is a happy number.

It is not a de Polignac number, because 83905155 - 2¹⁵ = 83872387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 932235 + ... + 932324.

It is an arithmetic number, because the mean of its divisors is an integer number (12119640).

Almost surely, 2^83905155 is an apocalyptic number.

83905155 is a deficient number, since it is larger than the sum of its proper divisors (61530525).

83905155 is a wasteful number, since it uses less digits than its factorization.

83905155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864570 (or 1864567 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 83905155 is about 9159.9757095748. The cubic root of 83905155 is about 437.7870203676.

The spelling of 83905155 in words is "eighty-three million, nine hundred five thousand, one hundred fifty-five".