2011511042 has 4 divisors (see below), whose sum is σ = 3017266566. Its totient is φ = 1005755520.

The previous prime is 2011511017. The next prime is 2011511081. The reversal of 2011511042 is 2401151102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1327217761 + 684293281 = 36431^2 + 26159^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2011511042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502877759 + ... + 502877762.

Almost surely, 2^2011511042 is an apocalyptic number.

2011511042 is a deficient number, since it is larger than the sum of its proper divisors (1005755524).

2011511042 is a wasteful number, since it uses less digits than its factorization.

2011511042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005755523.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2011511042 is about 44849.8722629173. The cubic root of 2011511042 is about 1262.3335946674. Note that the first 3 decimals are identical.

Adding to 2011511042 its reverse (2401151102), we get a palindrome (4412662144).

The spelling of 2011511042 in words is "two billion, eleven million, five hundred eleven thousand, forty-two".