70216520 has 64 divisors (see below), whose sum is σ = 175659840. Its totient is φ = 25043200.

The previous prime is 70216501. The next prime is 70216541. The reversal of 70216520 is 2561207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21815 + ... + 24825.

It is an arithmetic number, because the mean of its divisors is an integer number (2744685).

Almost surely, 2^70216520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70216520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87829920).

70216520 is an abundant number, since it is smaller than the sum of its proper divisors (105443320).

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

70216520 is a wasteful number, since it uses less digits than its factorization.

70216520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086 (or 3082 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 70216520 is about 8379.5298197453. The cubic root of 70216520 is about 412.5530167547.

Adding to 70216520 its reverse (2561207), we get a palindrome (72777727).

The spelling of 70216520 in words is "seventy million, two hundred sixteen thousand, five hundred twenty".