2231313031 has 4 divisors (see below), whose sum is σ = 2245002232. Its totient is φ = 2217623832.

The previous prime is 2231313023. The next prime is 2231313103. The reversal of 2231313031 is 1303131322.

2231313031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2231313031 - 2³ = 2231313023 is a prime.

It is a super-3 number, since 3×2231313031³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231313131) 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, 6844356 + ... + 6844681.

It is an arithmetic number, because the mean of its divisors is an integer number (561250558).

Almost surely, 2^2231313031 is an apocalyptic number.

2231313031 is a deficient number, since it is larger than the sum of its proper divisors (13689201).

2231313031 is a wasteful number, since it uses less digits than its factorization.

2231313031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13689200.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 2231313031 is about 47236.7762553712. The cubic root of 2231313031 is about 1306.7329250279.

Adding to 2231313031 its reverse (1303131322), we get a palindrome (3534444353).

It can be divided in two parts, 22313 and 13031, that added together give a square (35344 = 188²).

The spelling of 2231313031 in words is "two billion, two hundred thirty-one million, three hundred thirteen thousand, thirty-one".