83801555 has 4 divisors (see below), whose sum is σ = 100561872. Its totient is φ = 67041240.

The previous prime is 83801477. The next prime is 83801563. The reversal of 83801555 is 55510838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55510838 = 2 ⋅27755419.

It is not a de Polignac number, because 83801555 - 2¹² = 83797459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8380151 + ... + 8380160.

It is an arithmetic number, because the mean of its divisors is an integer number (25140468).

Almost surely, 2^83801555 is an apocalyptic number.

83801555 is a deficient number, since it is larger than the sum of its proper divisors (16760317).

83801555 is a wasteful number, since it uses less digits than its factorization.

83801555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16760316.

The product of its (nonzero) digits is 24000, while the sum is 35.

The square root of 83801555 is about 9154.3189260589. The cubic root of 83801555 is about 437.6067636041.

The spelling of 83801555 in words is "eighty-three million, eight hundred one thousand, five hundred fifty-five".