3706351221 has 8 divisors (see below), whose sum is σ = 4942089504. Its totient is φ = 2470756880.

The previous prime is 3706351219. The next prime is 3706351241. The reversal of 3706351221 is 1221536073.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3706351221 - 2¹ = 3706351219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3706351211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62986 + ... + 106676.

It is an arithmetic number, because the mean of its divisors is an integer number (617761188).

Almost surely, 2^3706351221 is an apocalyptic number.

It is an amenable number.

3706351221 is a deficient number, since it is larger than the sum of its proper divisors (1235738283).

3706351221 is a wasteful number, since it uses less digits than its factorization.

3706351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71971.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 3706351221 is about 60879.8096334080. The cubic root of 3706351221 is about 1547.5648506642.

Adding to 3706351221 its reverse (1221536073), we get a palindrome (4927887294).

The spelling of 3706351221 in words is "three billion, seven hundred six million, three hundred fifty-one thousand, two hundred twenty-one".