3221645072 has 10 divisors (see below), whose sum is σ = 6241937358. Its totient is φ = 1610822528.

The previous prime is 3221645059. The next prime is 3221645101. The reversal of 3221645072 is 2705461223.

It can be written as a sum of positive squares in only one way, i.e., 2509609216 + 712035856 = 50096^2 + 26684^2 .

It is a super-3 number, since 3×3221645072³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100676393 + ... + 100676424.

Almost surely, 2^3221645072 is an apocalyptic number.

It is an amenable number.

3221645072 is a deficient number, since it is larger than the sum of its proper divisors (3020292286).

3221645072 is a wasteful number, since it uses less digits than its factorization.

3221645072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201352825 (or 201352819 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 3221645072 is about 56759.5372778884. The cubic root of 3221645072 is about 1476.9276831109.

The spelling of 3221645072 in words is "three billion, two hundred twenty-one million, six hundred forty-five thousand, seventy-two".