613220131 has 2 divisors, whose sum is σ = 613220132. Its totient is φ = 613220130.

The previous prime is 613220081. The next prime is 613220137. The reversal of 613220131 is 131022316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613220131 - 2⁹ = 613219619 is a prime.

It is a super-2 number, since 2×613220131² = 752077858127314322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 613220099 and 613220108.

It is not a weakly prime, because it can be changed into another prime (613220137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306610065 + 306610066.

It is an arithmetic number, because the mean of its divisors is an integer number (306610066).

Almost surely, 2^613220131 is an apocalyptic number.

613220131 is a deficient number, since it is larger than the sum of its proper divisors (1).

613220131 is an equidigital number, since it uses as much as digits as its factorization.

613220131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 613220131 is about 24763.2819109261. The cubic root of 613220131 is about 849.5823235138.

Adding to 613220131 its reverse (131022316), we get a palindrome (744242447).

The spelling of 613220131 in words is "six hundred thirteen million, two hundred twenty thousand, one hundred thirty-one".