2156204623 has 2 divisors, whose sum is σ = 2156204624. Its totient is φ = 2156204622.

The previous prime is 2156204593. The next prime is 2156204629. The reversal of 2156204623 is 3264026512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156204623 - 2⁹ = 2156204111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156204629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078102311 + 1078102312.

It is an arithmetic number, because the mean of its divisors is an integer number (1078102312).

Almost surely, 2^2156204623 is an apocalyptic number.

2156204623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156204623 is an equidigital number, since it uses as much as digits as its factorization.

2156204623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 2156204623 is about 46434.9504468348. The cubic root of 2156204623 is about 1291.9032505183.

The spelling of 2156204623 in words is "two billion, one hundred fifty-six million, two hundred four thousand, six hundred twenty-three".