820861151 has 12 divisors (see below), whose sum is σ = 905755704. Its totient is φ = 737774400.

The previous prime is 820861127. The next prime is 820861163. The reversal of 820861151 is 151168028.

It is not a de Polignac number, because 820861151 - 2⁶ = 820861087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820860151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82421 + ... + 91841.

It is an arithmetic number, because the mean of its divisors is an integer number (75479642).

Almost surely, 2^820861151 is an apocalyptic number.

820861151 is a deficient number, since it is larger than the sum of its proper divisors (84894553).

820861151 is an equidigital number, since it uses as much as digits as its factorization.

820861151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9610 (or 9521 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 820861151 is about 28650.6745295813. The cubic root of 820861151 is about 936.3177016918.

The spelling of 820861151 in words is "eight hundred twenty million, eight hundred sixty-one thousand, one hundred fifty-one".