2001100531 has 2 divisors, whose sum is σ = 2001100532. Its totient is φ = 2001100530.

The previous prime is 2001100523. The next prime is 2001100597. The reversal of 2001100531 is 1350011002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001100531 - 2³ = 2001100523 is a prime.

It is a super-2 number, since 2×2001100531² = 8008806670336963922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001100511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000550265 + 1000550266.

It is an arithmetic number, because the mean of its divisors is an integer number (1000550266).

Almost surely, 2^2001100531 is an apocalyptic number.

2001100531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001100531 is an equidigital number, since it uses as much as digits as its factorization.

2001100531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 2001100531 is about 44733.6621684387. The cubic root of 2001100531 is about 1260.1521045484.

Adding to 2001100531 its reverse (1350011002), we get a palindrome (3351111533).

The spelling of 2001100531 in words is "two billion, one million, one hundred thousand, five hundred thirty-one".