1056543215 has 24 divisors (see below), whose sum is σ = 1569015648. Its totient is φ = 668753280.

The previous prime is 1056543193. The next prime is 1056543223. The reversal of 1056543215 is 5123456501.

It is not a de Polignac number, because 1056543215 - 2⁶ = 1056543151 is a prime.

It is a super-2 number, since 2×1056543215² = 2232567130325072450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83396 + ... + 95225.

It is an arithmetic number, because the mean of its divisors is an integer number (65375652).

Almost surely, 2^1056543215 is an apocalyptic number.

1056543215 is a deficient number, since it is larger than the sum of its proper divisors (512472433).

1056543215 is a wasteful number, since it uses less digits than its factorization.

1056543215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178659 (or 178646 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1056543215 is about 32504.5106869800. The cubic root of 1056543215 is about 1018.5032561875.

Adding to 1056543215 its reverse (5123456501), we get a palindrome (6179999716).

The spelling of 1056543215 in words is "one billion, fifty-six million, five hundred forty-three thousand, two hundred fifteen".