820015270143 has 4 divisors (see below), whose sum is σ = 1093353693528. Its totient is φ = 546676846760.

The previous prime is 820015270093. The next prime is 820015270213. The reversal of 820015270143 is 341072510028.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 820015270143 - 2²² = 820011075839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820015278143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136669211688 + ... + 136669211693.

It is an arithmetic number, because the mean of its divisors is an integer number (273338423382).

Almost surely, 2^820015270143 is an apocalyptic number.

820015270143 is a deficient number, since it is larger than the sum of its proper divisors (273338423385).

820015270143 is a wasteful number, since it uses less digits than its factorization.

820015270143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273338423384.

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 820015270143 in words is "eight hundred twenty billion, fifteen million, two hundred seventy thousand, one hundred forty-three".