216246451 has 2 divisors, whose sum is σ = 216246452. Its totient is φ = 216246450.

The previous prime is 216246449. The next prime is 216246469. The reversal of 216246451 is 154642612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216246451 - 2¹ = 216246449 is a prime.

Together with 216246449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (216246491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108123225 + 108123226.

It is an arithmetic number, because the mean of its divisors is an integer number (108123226).

Almost surely, 2^216246451 is an apocalyptic number.

216246451 is a deficient number, since it is larger than the sum of its proper divisors (1).

216246451 is an equidigital number, since it uses as much as digits as its factorization.

216246451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 216246451 is about 14705.3204997375. The cubic root of 216246451 is about 600.2281086368.

The spelling of 216246451 in words is "two hundred sixteen million, two hundred forty-six thousand, four hundred fifty-one".