70223191 has 2 divisors, whose sum is σ = 70223192. Its totient is φ = 70223190.

The previous prime is 70223149. The next prime is 70223203. The reversal of 70223191 is 19132207.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70223191 - 2⁹ = 70222679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70223291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35111595 + 35111596.

It is an arithmetic number, because the mean of its divisors is an integer number (35111596).

Almost surely, 2^70223191 is an apocalyptic number.

70223191 is a deficient number, since it is larger than the sum of its proper divisors (1).

70223191 is an equidigital number, since it uses as much as digits as its factorization.

70223191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 70223191 is about 8379.9278636513. The cubic root of 70223191 is about 412.5660813632.

Adding to 70223191 its reverse (19132207), we get a palindrome (89355398).

The spelling of 70223191 in words is "seventy million, two hundred twenty-three thousand, one hundred ninety-one".