3115221378 has 16 divisors (see below), whose sum is σ = 6309310080. Its totient is φ = 1025262576.

The previous prime is 3115221377. The next prime is 3115221427. The reversal of 3115221378 is 8731225113.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3115221377) 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, 3285625 + ... + 3286572.

It is an arithmetic number, because the mean of its divisors is an integer number (394331880).

Almost surely, 2^3115221378 is an apocalyptic number.

3115221378 is an abundant number, since it is smaller than the sum of its proper divisors (3194088702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3115221378 is a wasteful number, since it uses less digits than its factorization.

3115221378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572281.

The product of its digits is 10080, while the sum is 33.

The square root of 3115221378 is about 55814.1682550228. The cubic root of 3115221378 is about 1460.4823229725.

The spelling of 3115221378 in words is "three billion, one hundred fifteen million, two hundred twenty-one thousand, three hundred seventy-eight".