402215550 has 96 divisors (see below), whose sum is σ = 1113678720. Its totient is φ = 95222400.

The previous prime is 402215549. The next prime is 402215557. The reversal of 402215550 is 55512204.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 402215550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402215557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68116 + ... + 73784.

It is an arithmetic number, because the mean of its divisors is an integer number (11600820).

Almost surely, 2^402215550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402215550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556839360).

402215550 is an abundant number, since it is smaller than the sum of its proper divisors (711463170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402215550 is a wasteful number, since it uses less digits than its factorization.

402215550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5738 (or 5733 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 402215550 is about 20055.3122638367. The cubic root of 402215550 is about 738.1641551393.

Adding to 402215550 its reverse (55512204), we get a palindrome (457727754).

The spelling of 402215550 in words is "four hundred two million, two hundred fifteen thousand, five hundred fifty".