70020522 has 72 divisors (see below), whose sum is σ = 179656932. Its totient is φ = 19578240.

The previous prime is 70020521. The next prime is 70020523. The reversal of 70020522 is 22502007.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70020521) and next prime (70020523).

It can be written as a sum of positive squares in 2 ways, for example, as 69705801 + 314721 = 8349^2 + 561^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 70020495 and 70020504.

It is not an unprimeable number, because it can be changed into a prime (70020521) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 27078 + ... + 29550.

Almost surely, 2^70020522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70020522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89828466).

70020522 is an abundant number, since it is smaller than the sum of its proper divisors (109636410).

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

70020522 is a wasteful number, since it uses less digits than its factorization.

70020522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516 (or 2502 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 70020522 is about 8367.8265995418. The cubic root of 70020522 is about 412.1688008157.

Adding to 70020522 its reverse (22502007), we get a palindrome (92522529).

The spelling of 70020522 in words is "seventy million, twenty thousand, five hundred twenty-two".