3131221801 has 8 divisors (see below), whose sum is σ = 3173431680. Its totient is φ = 3089076432.

The previous prime is 3131221799. The next prime is 3131221837. The reversal of 3131221801 is 1081221313.

It is a happy number.

3131221801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3131221801 - 2¹ = 3131221799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131221861) 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, 85911 + ... + 116803.

It is an arithmetic number, because the mean of its divisors is an integer number (396678960).

Almost surely, 2^3131221801 is an apocalyptic number.

It is an amenable number.

3131221801 is a deficient number, since it is larger than the sum of its proper divisors (42209879).

3131221801 is a wasteful number, since it uses less digits than its factorization.

3131221801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32255.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 3131221801 is about 55957.3212457494. The cubic root of 3131221801 is about 1462.9785008989.

The spelling of 3131221801 in words is "three billion, one hundred thirty-one million, two hundred twenty-one thousand, eight hundred one".