402216655 has 8 divisors (see below), whose sum is σ = 486133200. Its totient is φ = 319457856.

The previous prime is 402216653. The next prime is 402216691. The reversal of 402216655 is 556612204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402216655 - 2¹ = 402216653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402216653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288670 + ... + 290059.

It is an arithmetic number, because the mean of its divisors is an integer number (60766650).

Almost surely, 2^402216655 is an apocalyptic number.

402216655 is a deficient number, since it is larger than the sum of its proper divisors (83916545).

402216655 is a wasteful number, since it uses less digits than its factorization.

402216655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578873.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 402216655 is about 20055.3398126285. The cubic root of 402216655 is about 738.1648311207.

Adding to 402216655 its reverse (556612204), we get a palindrome (958828859).

The spelling of 402216655 in words is "four hundred two million, two hundred sixteen thousand, six hundred fifty-five".