820715275 has 24 divisors (see below), whose sum is σ = 1040044544. Its totient is φ = 642297600.

The previous prime is 820715261. The next prime is 820715281. The reversal of 820715275 is 572517028.

It is not a de Polignac number, because 820715275 - 2²¹ = 818618123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 230005 + ... + 233545.

Almost surely, 2^820715275 is an apocalyptic number.

820715275 is a deficient number, since it is larger than the sum of its proper divisors (219329269).

820715275 is a wasteful number, since it uses less digits than its factorization.

820715275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751 (or 3746 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 820715275 is about 28648.1286474352. The cubic root of 820715275 is about 936.2622337756.

The spelling of 820715275 in words is "eight hundred twenty million, seven hundred fifteen thousand, two hundred seventy-five".