1615042243 has 4 divisors (see below), whose sum is σ = 1615827168. Its totient is φ = 1614257320.

The previous prime is 1615042241. The next prime is 1615042249. The reversal of 1615042243 is 3422405161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422405161 = 7 ⋅488915023.

It is a cyclic number.

It is not a de Polignac number, because 1615042243 - 2¹ = 1615042241 is a prime.

It is a super-2 number, since 2×1615042243² = 5216722893348942098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1615042241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389368 + ... + 393493.

It is an arithmetic number, because the mean of its divisors is an integer number (403956792).

Almost surely, 2^1615042243 is an apocalyptic number.

1615042243 is a deficient number, since it is larger than the sum of its proper divisors (784925).

1615042243 is an equidigital number, since it uses as much as digits as its factorization.

1615042243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784924.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1615042243 is about 40187.5881709764. The cubic root of 1615042243 is about 1173.2609839834.

The spelling of 1615042243 in words is "one billion, six hundred fifteen million, forty-two thousand, two hundred forty-three".