215862223453 has 2 divisors, whose sum is σ = 215862223454. Its totient is φ = 215862223452.

The previous prime is 215862223333. The next prime is 215862223519. The reversal of 215862223453 is 354322268512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187846828569 + 28015394884 = 433413^2 + 167378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215862223453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215862223153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107931111726 + 107931111727.

It is an arithmetic number, because the mean of its divisors is an integer number (107931111727).

Almost surely, 2^215862223453 is an apocalyptic number.

It is an amenable number.

215862223453 is a deficient number, since it is larger than the sum of its proper divisors (1).

215862223453 is an equidigital number, since it uses as much as digits as its factorization.

215862223453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 43.

The spelling of 215862223453 in words is "two hundred fifteen billion, eight hundred sixty-two million, two hundred twenty-three thousand, four hundred fifty-three".