402144434215 has 8 divisors (see below), whose sum is σ = 482577805008. Its totient is φ = 321712558080.

The previous prime is 402144434213. The next prime is 402144434257. The reversal of 402144434215 is 512434441204.

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

It is not a de Polignac number, because 402144434215 - 2¹ = 402144434213 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 (402144434213) 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 7 ways as a sum of consecutive naturals, for example, 343335 + ... + 960295.

It is an arithmetic number, because the mean of its divisors is an integer number (60322225626).

Almost surely, 2^402144434215 is an apocalyptic number.

402144434215 is a deficient number, since it is larger than the sum of its proper divisors (80433370793).

402144434215 is a wasteful number, since it uses less digits than its factorization.

402144434215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747329.

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 402144434215 its reverse (512434441204), we get a palindrome (914578875419).

The spelling of 402144434215 in words is "four hundred two billion, one hundred forty-four million, four hundred thirty-four thousand, two hundred fifteen".