2820515540 has 12 divisors (see below), whose sum is σ = 5923082676. Its totient is φ = 1128206208.

The previous prime is 2820515539. The next prime is 2820515557. The reversal of 2820515540 is 455150282.

It can be written as a sum of positive squares in 2 ways, for example, as 2122076356 + 698439184 = 46066^2 + 26428^2 .

It is a super-2 number, since 2×2820515540² = 15910615822762983200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2820515497 and 2820515506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70512869 + ... + 70512908.

It is an arithmetic number, because the mean of its divisors is an integer number (493590223).

Almost surely, 2^2820515540 is an apocalyptic number.

2820515540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2820515540 is an abundant number, since it is smaller than the sum of its proper divisors (3102567136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2820515540 is a wasteful number, since it uses less digits than its factorization.

2820515540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141025786 (or 141025784 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 2820515540 is about 53108.5260574985. The cubic root of 2820515540 is about 1412.8937335553.

The spelling of 2820515540 in words is "two billion, eight hundred twenty million, five hundred fifteen thousand, five hundred forty".