1020055515 has 16 divisors (see below), whose sum is σ = 1632922368. Its totient is φ = 543751776.

The previous prime is 1020055511. The next prime is 1020055549. The reversal of 1020055515 is 5155500201.

It is not a de Polignac number, because 1020055515 - 2² = 1020055511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020055511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14922 + ... + 47568.

It is an arithmetic number, because the mean of its divisors is an integer number (102057648).

Almost surely, 2^1020055515 is an apocalyptic number.

1020055515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020055515 is a deficient number, since it is larger than the sum of its proper divisors (612866853).

1020055515 is a wasteful number, since it uses less digits than its factorization.

1020055515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34738.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 1020055515 is about 31938.3079545551. The cubic root of 1020055515 is about 1006.6409715359.

Adding to 1020055515 its reverse (5155500201), we get a palindrome (6175555716).

The spelling of 1020055515 in words is "one billion, twenty million, fifty-five thousand, five hundred fifteen".