2261011031 has 4 divisors (see below), whose sum is σ = 2267172192. Its totient is φ = 2254849872.

The previous prime is 2261011003. The next prime is 2261011037. The reversal of 2261011031 is 1301101622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1301101622 = 2 ⋅650550811.

It is a cyclic number.

It is not a de Polignac number, because 2261011031 - 2¹⁸ = 2260748887 is a prime.

It is a super-2 number, since 2×2261011031² = 10224341764607365922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261011037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3080030 + ... + 3080763.

It is an arithmetic number, because the mean of its divisors is an integer number (566793048).

Almost surely, 2^2261011031 is an apocalyptic number.

2261011031 is a deficient number, since it is larger than the sum of its proper divisors (6161161).

2261011031 is an equidigital number, since it uses as much as digits as its factorization.

2261011031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161160.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2261011031 is about 47550.0897054885. The cubic root of 2261011031 is about 1312.5047799796.

Adding to 2261011031 its reverse (1301101622), we get a palindrome (3562112653).

The spelling of 2261011031 in words is "two billion, two hundred sixty-one million, eleven thousand, thirty-one".