70561221 has 16 divisors (see below), whose sum is σ = 95222400. Its totient is φ = 46474560.

The previous prime is 70561219. The next prime is 70561261. The reversal of 70561221 is 12216507.

It is not a de Polignac number, because 70561221 - 2¹ = 70561219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70561191 and 70561200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70561261) 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 15 ways as a sum of consecutive naturals, for example, 107731 + ... + 108383.

It is an arithmetic number, because the mean of its divisors is an integer number (5951400).

Almost surely, 2^70561221 is an apocalyptic number.

It is an amenable number.

70561221 is a deficient number, since it is larger than the sum of its proper divisors (24661179).

70561221 is a wasteful number, since it uses less digits than its factorization.

70561221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 70561221 is about 8400.0726782570. The cubic root of 70561221 is about 413.2270051826.

Adding to 70561221 its reverse (12216507), we get a palindrome (82777728).

The spelling of 70561221 in words is "seventy million, five hundred sixty-one thousand, two hundred twenty-one".