3221140261 has 4 divisors (see below), whose sum is σ = 3222459072. Its totient is φ = 3219821452.

The previous prime is 3221140249. The next prime is 3221140303. The reversal of 3221140261 is 1620411223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1620411223 = 59 ⋅27464597.

It is a cyclic number.

It is not a de Polignac number, because 3221140261 - 2¹⁵ = 3221107493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221140061) 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, 655735 + ... + 660628.

It is an arithmetic number, because the mean of its divisors is an integer number (805614768).

Almost surely, 2^3221140261 is an apocalyptic number.

It is an amenable number.

3221140261 is a deficient number, since it is larger than the sum of its proper divisors (1318811).

3221140261 is a wasteful number, since it uses less digits than its factorization.

3221140261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318810.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 3221140261 is about 56755.0901770053. The cubic root of 3221140261 is about 1476.8505374012.

Adding to 3221140261 its reverse (1620411223), we get a palindrome (4841551484).

The spelling of 3221140261 in words is "three billion, two hundred twenty-one million, one hundred forty thousand, two hundred sixty-one".