216023521972373 has 2 divisors, whose sum is σ = 216023521972374. Its totient is φ = 216023521972372.

The previous prime is 216023521972339. The next prime is 216023521972487. The reversal of 216023521972373 is 373279125320612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199285792727044 + 16737729245329 = 14116862^2 + 4091177^2 .

It is a cyclic number.

It is not a de Polignac number, because 216023521972373 - 2¹⁶ = 216023521906837 is a prime.

It is a super-2 number, since 2×216023521972373² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216023521872373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108011760986186 + 108011760986187.

It is an arithmetic number, because the mean of its divisors is an integer number (108011760986187).

Almost surely, 2^{216023521972373} is an apocalyptic number.

It is an amenable number.

216023521972373 is a deficient number, since it is larger than the sum of its proper divisors (1).

216023521972373 is an equidigital number, since it uses as much as digits as its factorization.

216023521972373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 53.

The spelling of 216023521972373 in words is "two hundred sixteen trillion, twenty-three billion, five hundred twenty-one million, nine hundred seventy-two thousand, three hundred seventy-three".