820155283 has 16 divisors (see below), whose sum is σ = 862414560. Its totient is φ = 779141376.

The previous prime is 820155277. The next prime is 820155307. The reversal of 820155283 is 382551028.

It is a cyclic number.

It is not a de Polignac number, because 820155283 - 2¹³ = 820147091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820155233) 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, 341535 + ... + 343927.

It is an arithmetic number, because the mean of its divisors is an integer number (53900910).

Almost surely, 2^820155283 is an apocalyptic number.

820155283 is a deficient number, since it is larger than the sum of its proper divisors (42259277).

820155283 is a wasteful number, since it uses less digits than its factorization.

820155283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 820155283 is about 28638.3533569931. The cubic root of 820155283 is about 936.0492412518.

The spelling of 820155283 in words is "eight hundred twenty million, one hundred fifty-five thousand, two hundred eighty-three".