402353021522 has 4 divisors (see below), whose sum is σ = 603529532286. Its totient is φ = 201176510760.

The previous prime is 402353021461. The next prime is 402353021527. The reversal of 402353021522 is 225120353204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 401044824961 + 1308196561 = 633281^2 + 36169^2 .

It is not an unprimeable number, because it can be changed into a prime (402353021527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100588255379 + ... + 100588255382.

Almost surely, 2^402353021522 is an apocalyptic number.

402353021522 is a deficient number, since it is larger than the sum of its proper divisors (201176510764).

402353021522 is a wasteful number, since it uses less digits than its factorization.

402353021522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201176510763.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 402353021522 its reverse (225120353204), we get a palindrome (627473374726).

The spelling of 402353021522 in words is "four hundred two billion, three hundred fifty-three million, twenty-one thousand, five hundred twenty-two".