1520571216 has 160 divisors (see below), whose sum is σ = 4379719680. Its totient is φ = 452390400.

The previous prime is 1520571211. The next prime is 1520571233. The reversal of 1520571216 is 6121750251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520571211) 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, 1488786 + ... + 1489806.

It is an arithmetic number, because the mean of its divisors is an integer number (27373248).

Almost surely, 2^1520571216 is an apocalyptic number.

1520571216 is a gapful number since it is divisible by the number (16) 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 1520571216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2189859840).

1520571216 is an abundant number, since it is smaller than the sum of its proper divisors (2859148464).

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

1520571216 is a wasteful number, since it uses less digits than its factorization.

1520571216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 1520571216 is about 38994.5023817461. The cubic root of 1520571216 is about 1149.9234267855.

The spelling of 1520571216 in words is "one billion, five hundred twenty million, five hundred seventy-one thousand, two hundred sixteen".