1020805051 has 8 divisors (see below), whose sum is σ = 1174066400. Its totient is φ = 869401728.

The previous prime is 1020805031. The next prime is 1020805061. The reversal of 1020805051 is 1505080201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020805051 - 2⁷ = 1020804923 is a prime.

It is a super-2 number, since 2×1020805051² = 2084085904294225202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020805031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463326 + ... + 465523.

It is an arithmetic number, because the mean of its divisors is an integer number (146758300).

Almost surely, 2^1020805051 is an apocalyptic number.

1020805051 is a deficient number, since it is larger than the sum of its proper divisors (153261349).

1020805051 is an equidigital number, since it uses as much as digits as its factorization.

1020805051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929013.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1020805051 is about 31950.0399217278. The cubic root of 1020805051 is about 1006.8874708379.

Adding to 1020805051 its reverse (1505080201), we get a palindrome (2525885252).

The spelling of 1020805051 in words is "one billion, twenty million, eight hundred five thousand, fifty-one".