3721660231 has 4 divisors (see below), whose sum is σ = 3772641952. Its totient is φ = 3670678512.

The previous prime is 3721660193. The next prime is 3721660249. The reversal of 3721660231 is 1320661273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1320661273 = 71 ⋅18600863.

It is a cyclic number.

It is not a de Polignac number, because 3721660231 - 2⁹ = 3721659719 is a prime.

It is a super-2 number, since 2×3721660231² = 27701509750013946722, 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 = 3721660193 and 3721660202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721660031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25490751 + ... + 25490896.

It is an arithmetic number, because the mean of its divisors is an integer number (943160488).

Almost surely, 2^3721660231 is an apocalyptic number.

3721660231 is a deficient number, since it is larger than the sum of its proper divisors (50981721).

3721660231 is an equidigital number, since it uses as much as digits as its factorization.

3721660231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50981720.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 3721660231 is about 61005.4114894736. The cubic root of 3721660231 is about 1549.6926523452.

The spelling of 3721660231 in words is "three billion, seven hundred twenty-one million, six hundred sixty thousand, two hundred thirty-one".