218956051 has 2 divisors, whose sum is σ = 218956052. Its totient is φ = 218956050.

The previous prime is 218956037. The next prime is 218956081. The reversal of 218956051 is 150659812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218956051 - 2¹¹ = 218954003 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218956051.

It is not a weakly prime, because it can be changed into another prime (218956081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109478025 + 109478026.

It is an arithmetic number, because the mean of its divisors is an integer number (109478026).

Almost surely, 2^218956051 is an apocalyptic number.

218956051 is a deficient number, since it is larger than the sum of its proper divisors (1).

218956051 is an equidigital number, since it uses as much as digits as its factorization.

218956051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 218956051 is about 14797.1636133416. The cubic root of 218956051 is about 602.7246922829.

The spelling of 218956051 in words is "two hundred eighteen million, nine hundred fifty-six thousand, fifty-one".