820224319951 has 2 divisors, whose sum is σ = 820224319952. Its totient is φ = 820224319950.

The previous prime is 820224319939. The next prime is 820224320053. The reversal of 820224319951 is 159913422028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820224319951 - 2³¹ = 818076836303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820224319751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410112159975 + 410112159976.

It is an arithmetic number, because the mean of its divisors is an integer number (410112159976).

Almost surely, 2^820224319951 is an apocalyptic number.

820224319951 is a deficient number, since it is larger than the sum of its proper divisors (1).

820224319951 is an equidigital number, since it uses as much as digits as its factorization.

820224319951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 820224319951 in words is "eight hundred twenty billion, two hundred twenty-four million, three hundred nineteen thousand, nine hundred fifty-one".