3661613131 has 8 divisors (see below), whose sum is σ = 3995854128. Its totient is φ = 3327600000.

The previous prime is 3661613113. The next prime is 3661613149. The reversal of 3661613131 is 1313161663.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3661613113) and next prime (3661613149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3661613131 - 2⁷ = 3661613003 is a prime.

It is a super-2 number, since 2×3661613131² = 26814821442223246322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3661613093 and 3661613102.

It is not an unprimeable number, because it can be changed into a prime (3661613531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22450 + ... + 88471.

It is an arithmetic number, because the mean of its divisors is an integer number (499481766).

Almost surely, 2^3661613131 is an apocalyptic number.

3661613131 is a deficient number, since it is larger than the sum of its proper divisors (334240997).

3661613131 is a wasteful number, since it uses less digits than its factorization.

3661613131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113933.

The product of its digits is 5832, while the sum is 31.

The square root of 3661613131 is about 60511.2644967861. The cubic root of 3661613131 is about 1541.3129202462.

Adding to 3661613131 its reverse (1313161663), we get a palindrome (4974774794).

The spelling of 3661613131 in words is "three billion, six hundred sixty-one million, six hundred thirteen thousand, one hundred thirty-one".