403221756242 has 6 divisors (see below), whose sum is σ = 604833981399. Its totient is φ = 201610429110.

The previous prime is 403221756209. The next prime is 403221756257. The reversal of 403221756242 is 242657122304.

It can be written as a sum of positive squares in only one way, i.e., 201610878121 + 201610878121 = 449011^2 + 449011^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=449011.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403221756196 and 403221756205.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 673517 + ... + 1122527.

Almost surely, 2^403221756242 is an apocalyptic number.

403221756242 is a deficient number, since it is larger than the sum of its proper divisors (201612225157).

403221756242 is an frugal number, since it uses more digits than its factorization.

403221756242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898024 (or 449013 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 38.

Adding to 403221756242 its reverse (242657122304), we get a palindrome (645878878546).

The spelling of 403221756242 in words is "four hundred three billion, two hundred twenty-one million, seven hundred fifty-six thousand, two hundred forty-two".