70358221 has 2 divisors, whose sum is σ = 70358222. Its totient is φ = 70358220.

The previous prime is 70358213. The next prime is 70358237. The reversal of 70358221 is 12285307.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54597321 + 15760900 = 7389^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 70358221 - 2³ = 70358213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70358221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70358261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35179110 + 35179111.

It is an arithmetic number, because the mean of its divisors is an integer number (35179111).

Almost surely, 2^70358221 is an apocalyptic number.

It is an amenable number.

70358221 is a deficient number, since it is larger than the sum of its proper divisors (1).

70358221 is an equidigital number, since it uses as much as digits as its factorization.

70358221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 70358221 is about 8387.9807462821. The cubic root of 70358221 is about 412.8303489001.

The spelling of 70358221 in words is "seventy million, three hundred fifty-eight thousand, two hundred twenty-one".