218452401 has 6 divisors (see below), whose sum is σ = 315542370. Its totient is φ = 145634928.

The previous prime is 218452373. The next prime is 218452411. The reversal of 218452401 is 104254812.

218452401 is a `hidden beast` number, since 218 + 45 + 2 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 208051776 + 10400625 = 14424^2 + 3225^2 .

It is not a de Polignac number, because 218452401 - 2⁹ = 218451889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218452411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12136236 + ... + 12136253.

It is an arithmetic number, because the mean of its divisors is an integer number (52590395).

Almost surely, 2^218452401 is an apocalyptic number.

It is an amenable number.

218452401 is a deficient number, since it is larger than the sum of its proper divisors (97089969).

218452401 is a wasteful number, since it uses less digits than its factorization.

218452401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24272495 (or 24272492 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 218452401 is about 14780.1353512070. The cubic root of 218452401 is about 602.2622016865.

The spelling of 218452401 in words is "two hundred eighteen million, four hundred fifty-two thousand, four hundred one".