1020543515 has 8 divisors (see below), whose sum is σ = 1239407568. Its totient is φ = 806597920.

The previous prime is 1020543497. The next prime is 1020543521. The reversal of 1020543515 is 5153450201.

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

It is not a de Polignac number, because 1020543515 - 2¹⁰ = 1020542491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229156 + ... + 1229985.

It is an arithmetic number, because the mean of its divisors is an integer number (154925946).

Almost surely, 2^1020543515 is an apocalyptic number.

1020543515 is a deficient number, since it is larger than the sum of its proper divisors (218864053).

1020543515 is an equidigital number, since it uses as much as digits as its factorization.

1020543515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459229.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1020543515 is about 31945.9467695043. The cubic root of 1020543515 is about 1006.8014734139.

Adding to 1020543515 its reverse (5153450201), we get a palindrome (6173993716).

The spelling of 1020543515 in words is "one billion, twenty million, five hundred forty-three thousand, five hundred fifteen".