402144444331 has 8 divisors (see below), whose sum is σ = 469372239360. Its totient is φ = 337361296488.

The previous prime is 402144444301. The next prime is 402144444341. The reversal of 402144444331 is 133444441204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402144444331 is a prime.

It is a super-2 number, since 2×402144444331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402144444301) 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, 611161441 + ... + 611162098.

It is an arithmetic number, because the mean of its divisors is an integer number (58671529920).

Almost surely, 2^402144444331 is an apocalyptic number.

402144444331 is a deficient number, since it is larger than the sum of its proper divisors (67227795029).

402144444331 is a wasteful number, since it uses less digits than its factorization.

402144444331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222323593.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 402144444331 its reverse (133444441204), we get a palindrome (535588885535).

The spelling of 402144444331 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-four thousand, three hundred thirty-one".