2261731031 has 4 divisors (see below), whose sum is σ = 2584835472. Its totient is φ = 1938626592.

The previous prime is 2261731019. The next prime is 2261731033. The reversal of 2261731031 is 1301371622.

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

It is not a de Polignac number, because 2261731031 - 2¹⁰ = 2261730007 is a prime.

It is a super-2 number, since 2×2261731031² = 10230854513176645922, 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 (2261731033) 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, 161552210 + ... + 161552223.

It is an arithmetic number, because the mean of its divisors is an integer number (646208868).

Almost surely, 2^2261731031 is an apocalyptic number.

2261731031 is a deficient number, since it is larger than the sum of its proper divisors (323104441).

2261731031 is an equidigital number, since it uses as much as digits as its factorization.

2261731031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323104440.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2261731031 is about 47557.6600664919. The cubic root of 2261731031 is about 1312.6440839070.

The spelling of 2261731031 in words is "two billion, two hundred sixty-one million, seven hundred thirty-one thousand, thirty-one".