1066215243 has 16 divisors (see below), whose sum is σ = 1434132000. Its totient is φ = 704574720.

The previous prime is 1066215233. The next prime is 1066215251. The reversal of 1066215243 is 3425126601.

It is not a de Polignac number, because 1066215243 - 2⁶ = 1066215179 is a prime.

It is a super-2 number, since 2×1066215243² = 2273629888811098098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066215243.

It is not an unprimeable number, because it can be changed into a prime (1066215233) 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, 239623 + ... + 244031.

It is an arithmetic number, because the mean of its divisors is an integer number (89633250).

Almost surely, 2^1066215243 is an apocalyptic number.

1066215243 is a deficient number, since it is larger than the sum of its proper divisors (367916757).

1066215243 is a wasteful number, since it uses less digits than its factorization.

1066215243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1066215243 is about 32652.9515204981. The cubic root of 1066215243 is about 1021.6017519307.

The spelling of 1066215243 in words is "one billion, sixty-six million, two hundred fifteen thousand, two hundred forty-three".