2231613 has 6 divisors (see below), whose sum is σ = 3223454. Its totient is φ = 1487736.

The previous prime is 2231609. The next prime is 2231617. The reversal of 2231613 is 3161322.

2231613 is a `hidden beast` number, since 22 + 31 + 613 = 666.

It is an interprime number because it is at equal distance from previous prime (2231609) and next prime (2231617).

It can be written as a sum of positive squares in only one way, i.e., 2152089 + 79524 = 1467^2 + 282^2 .

It is not a de Polignac number, because 2231613 - 2² = 2231609 is a prime.

It is a super-3 number, since 3×2231613³ = 33340944819393790191, which contains 333 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 (2231617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123970 + ... + 123987.

2^2231613 is an apocalyptic number.

It is an amenable number.

2231613 is a deficient number, since it is larger than the sum of its proper divisors (991841).

2231613 is a wasteful number, since it uses less digits than its factorization.

2231613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247963 (or 247960 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2231613 is about 1493.8584270271. The cubic root of 2231613 is about 130.6791479759.

Adding to 2231613 its reverse (3161322), we get a palindrome (5392935).

The spelling of 2231613 in words is "two million, two hundred thirty-one thousand, six hundred thirteen".