218074473 has 12 divisors (see below), whose sum is σ = 315227380. Its totient is φ = 145276416.

The previous prime is 218074471. The next prime is 218074499. The reversal of 218074473 is 374470812.

It is a happy number.

218074473 is a `hidden beast` number, since 2 + 180 + 7 + 4 + 473 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 140493609 + 77580864 = 11853^2 + 8808^2 .

It is not a de Polignac number, because 218074473 - 2¹ = 218074471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218074471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5265 + ... + 21537.

Almost surely, 2^218074473 is an apocalyptic number.

It is an amenable number.

218074473 is a deficient number, since it is larger than the sum of its proper divisors (97152907).

218074473 is a wasteful number, since it uses less digits than its factorization.

218074473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17768 (or 17765 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 218074473 is about 14767.3448188901. The cubic root of 218074473 is about 601.9146917597.

The spelling of 218074473 in words is "two hundred eighteen million, seventy-four thousand, four hundred seventy-three".