1015540542243 has 12 divisors (see below), whose sum is σ = 1471670047848. Its totient is φ = 674821726560.

The previous prime is 1015540542241. The next prime is 1015540542251. The reversal of 1015540542243 is 3422450455101.

1015540542243 is a `hidden beast` number, since 1 + 0 + 1 + 5 + 5 + 405 + 4 + 2 + 243 = 666.

It is not a de Polignac number, because 1015540542243 - 2¹ = 1015540542241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1015540542198 and 1015540542207.

It is not an unprimeable number, because it can be changed into a prime (1015540542241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183772218 + ... + 183777743.

It is an arithmetic number, because the mean of its divisors is an integer number (122639170654).

Almost surely, 2^{1015540542243} is an apocalyptic number.

1015540542243 is a deficient number, since it is larger than the sum of its proper divisors (456129505605).

1015540542243 is a wasteful number, since it uses less digits than its factorization.

1015540542243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367550274 (or 367550271 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 1015540542243 its reverse (3422450455101), we get a palindrome (4437990997344).

The spelling of 1015540542243 in words is "one trillion, fifteen billion, five hundred forty million, five hundred forty-two thousand, two hundred forty-three".