3867213231522 has 128 divisors (see below), whose sum is σ = 9174419251200. Its totient is φ = 1203238084608.

The previous prime is 3867213231517. The next prime is 3867213231523. The reversal of 3867213231522 is 2251323127683.

It is a happy number.

3867213231522 is a `hidden beast` number, since 3 + 8 + 67 + 2 + 1 + 32 + 31 + 522 = 666.

It is not an unprimeable number, because it can be changed into a prime (3867213231523) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 449201554 + ... + 449210162.

It is an arithmetic number, because the mean of its divisors is an integer number (71675150400).

Almost surely, 2^{3867213231522} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3867213231522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4587209625600).

3867213231522 is an abundant number, since it is smaller than the sum of its proper divisors (5307206019678).

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

3867213231522 is a wasteful number, since it uses less digits than its factorization.

3867213231522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12617 (or 12611 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 3867213231522 in words is "three trillion, eight hundred sixty-seven billion, two hundred thirteen million, two hundred thirty-one thousand, five hundred twenty-two".