1001055501 has 6 divisors (see below), whose sum is σ = 1445969070. Its totient is φ = 667370328.

The previous prime is 1001055499. The next prime is 1001055511. The reversal of 1001055501 is 1055501001.

1001055501 is a `hidden beast` number, since 10 + 0 + 105 + 550 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 965593476 + 35462025 = 31074^2 + 5955^2 .

It is not a de Polignac number, because 1001055501 - 2¹ = 1001055499 is a prime.

It is a super-2 number, since 2×1001055501² = 2004224232164722002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001055511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55614186 + ... + 55614203.

It is an arithmetic number, because the mean of its divisors is an integer number (240994845).

Almost surely, 2^1001055501 is an apocalyptic number.

It is an amenable number.

1001055501 is a deficient number, since it is larger than the sum of its proper divisors (444913569).

1001055501 is a wasteful number, since it uses less digits than its factorization.

1001055501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111228395 (or 111228392 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 1001055501 is about 31639.4611363721. The cubic root of 1001055501 is about 1000.3517099523.

Adding to 1001055501 its reverse (1055501001), we get a palindrome (2056556502).

The spelling of 1001055501 in words is "one billion, one million, fifty-five thousand, five hundred one".