83555381 has 16 divisors (see below), whose sum is σ = 103867008. Its totient is φ = 65448000.

The previous prime is 83555347. The next prime is 83555411. The reversal of 83555381 is 18355538.

It is not a de Polignac number, because 83555381 - 2⁶ = 83555317 is a prime.

It is a super-2 number, since 2×83555381² = 13963003388110322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83555081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4646 + ... + 13736.

It is an arithmetic number, because the mean of its divisors is an integer number (6491688).

Almost surely, 2^83555381 is an apocalyptic number.

It is an amenable number.

83555381 is a deficient number, since it is larger than the sum of its proper divisors (20311627).

83555381 is a wasteful number, since it uses less digits than its factorization.

83555381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9212.

The product of its digits is 72000, while the sum is 38.

The square root of 83555381 is about 9140.8632524505. The cubic root of 83555381 is about 437.1778413088.

The spelling of 83555381 in words is "eighty-three million, five hundred fifty-five thousand, three hundred eighty-one".