1522216421320 has 128 divisors (see below), whose sum is σ = 4022241753600. Its totient is φ = 507521949696.

The previous prime is 1522216421311. The next prime is 1522216421329. The reversal of 1522216421320 is 231246122251.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1522216421311) and next prime (1522216421329).

It is not an unprimeable number, because it can be changed into a prime (1522216421329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19531149 + ... + 19608931.

It is an arithmetic number, because the mean of its divisors is an integer number (31423763700).

Almost surely, 2^{1522216421320} is an apocalyptic number.

1522216421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1522216421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011120876800).

1522216421320 is an abundant number, since it is smaller than the sum of its proper divisors (2500025332280).

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

1522216421320 is a wasteful number, since it uses less digits than its factorization.

1522216421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79727 (or 79723 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 1522216421320 in words is "one trillion, five hundred twenty-two billion, two hundred sixteen million, four hundred twenty-one thousand, three hundred twenty".