1001055511 has 2 divisors, whose sum is σ = 1001055512. Its totient is φ = 1001055510.

The previous prime is 1001055499. The next prime is 1001055533. The reversal of 1001055511 is 1155501001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1155501001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001055511 - 2⁵ = 1001055479 is a prime.

It is a super-2 number, since 2×1001055511² = 2004224272206942242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001055551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500527755 + 500527756.

It is an arithmetic number, because the mean of its divisors is an integer number (500527756).

Almost surely, 2^1001055511 is an apocalyptic number.

1001055511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001055511 is an equidigital number, since it uses as much as digits as its factorization.

1001055511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 1001055511 is about 31639.4612944026. The cubic root of 1001055511 is about 1000.3517132833.

Adding to 1001055511 its reverse (1155501001), we get a palindrome (2156556512).

The spelling of 1001055511 in words is "one billion, one million, fifty-five thousand, five hundred eleven".