3321561401 has 4 divisors (see below), whose sum is σ = 3322010100. Its totient is φ = 3321112704.

The previous prime is 3321561389. The next prime is 3321561403. The reversal of 3321561401 is 1041651233.

3321561401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1041651233 = 7 ⋅148807319.

It can be written as a sum of positive squares in 2 ways, for example, as 2445401401 + 876160000 = 49451^2 + 29600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3321561401 is a prime.

It is a super-2 number, since 2×3321561401² = 22065540281226165602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3321561403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213056 + ... + 228113.

It is an arithmetic number, because the mean of its divisors is an integer number (830502525).

Almost surely, 2^3321561401 is an apocalyptic number.

It is an amenable number.

3321561401 is a deficient number, since it is larger than the sum of its proper divisors (448699).

3321561401 is an equidigital number, since it uses as much as digits as its factorization.

3321561401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448698.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 3321561401 is about 57632.9888258452. The cubic root of 3321561401 is about 1492.0410149140.

The spelling of 3321561401 in words is "three billion, three hundred twenty-one million, five hundred sixty-one thousand, four hundred one".