3554212721 has 4 divisors (see below), whose sum is σ = 3559740912. Its totient is φ = 3548684532.

The previous prime is 3554212693. The next prime is 3554212741. The reversal of 3554212721 is 1272124553.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3554212721 is a prime.

It is a super-2 number, since 2×3554212721² = 25264856132236447682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3554212741) 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, 2763131 + ... + 2764416.

It is an arithmetic number, because the mean of its divisors is an integer number (889935228).

Almost surely, 2^3554212721 is an apocalyptic number.

It is an amenable number.

3554212721 is a deficient number, since it is larger than the sum of its proper divisors (5528191).

3554212721 is an equidigital number, since it uses as much as digits as its factorization.

3554212721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528190.

The product of its digits is 16800, while the sum is 32.

The square root of 3554212721 is about 59617.2183265875. The cubic root of 3554212721 is about 1526.0934873133.

The spelling of 3554212721 in words is "three billion, five hundred fifty-four million, two hundred twelve thousand, seven hundred twenty-one".