3661220302531 has 8 divisors (see below), whose sum is σ = 3994073834544. Its totient is φ = 3328369324320.

The previous prime is 3661220302529. The next prime is 3661220302577. The reversal of 3661220302531 is 1352030221663.

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 3661220302531 - 2¹ = 3661220302529 is a prime.

It is a super-2 number, since 2×3661220302531² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661220302031) 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, 3559021 + ... + 4470913.

It is an arithmetic number, because the mean of its divisors is an integer number (499259229318).

Almost surely, 2^{3661220302531} is an apocalyptic number.

3661220302531 is a deficient number, since it is larger than the sum of its proper divisors (332853532013).

3661220302531 is a wasteful number, since it uses less digits than its factorization.

3661220302531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276901.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 3661220302531 in words is "three trillion, six hundred sixty-one billion, two hundred twenty million, three hundred two thousand, five hundred thirty-one".