402216323551 has 6 divisors (see below), whose sum is σ = 467884294800. Its totient is φ = 344756848716.

The previous prime is 402216323521. The next prime is 402216323569. The reversal of 402216323551 is 155323612204.

It is not a de Polignac number, because 402216323551 - 2⁷ = 402216323423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402216323521) 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, 4104248151 + ... + 4104248248.

It is an arithmetic number, because the mean of its divisors is an integer number (77980715800).

Almost surely, 2^402216323551 is an apocalyptic number.

402216323551 is a deficient number, since it is larger than the sum of its proper divisors (65667971249).

402216323551 is an equidigital number, since it uses as much as digits as its factorization.

402216323551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8208496413 (or 8208496406 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 402216323551 its reverse (155323612204), we get a palindrome (557539935755).

The spelling of 402216323551 in words is "four hundred two billion, two hundred sixteen million, three hundred twenty-three thousand, five hundred fifty-one".