215622779923 has 2 divisors, whose sum is σ = 215622779924. Its totient is φ = 215622779922.

The previous prime is 215622779891. The next prime is 215622779969. The reversal of 215622779923 is 329977226512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215622779923 - 2⁵ = 215622779891 is a prime.

It is not a weakly prime, because it can be changed into another prime (215622779423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107811389961 + 107811389962.

It is an arithmetic number, because the mean of its divisors is an integer number (107811389962).

Almost surely, 2^215622779923 is an apocalyptic number.

215622779923 is a deficient number, since it is larger than the sum of its proper divisors (1).

215622779923 is an equidigital number, since it uses as much as digits as its factorization.

215622779923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 55.

The spelling of 215622779923 in words is "two hundred fifteen billion, six hundred twenty-two million, seven hundred seventy-nine thousand, nine hundred twenty-three".