201543343402 has 4 divisors (see below), whose sum is σ = 302315015106. Its totient is φ = 100771671700.

The previous prime is 201543343303. The next prime is 201543343409. The reversal of 201543343402 is 204343345102.

It is a happy number.

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., 126088197921 + 75455145481 = 355089^2 + 274691^2 .

It is not an unprimeable number, because it can be changed into a prime (201543343409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50385835849 + ... + 50385835852.

Almost surely, 2^201543343402 is an apocalyptic number.

201543343402 is a deficient number, since it is larger than the sum of its proper divisors (100771671704).

201543343402 is a wasteful number, since it uses less digits than its factorization.

201543343402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100771671703.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 201543343402 its reverse (204343345102), we get a palindrome (405886688504).

It can be divided in two parts, 20154 and 3343402, that added together give a square (3363556 = 1834²).

The spelling of 201543343402 in words is "two hundred one billion, five hundred forty-three million, three hundred forty-three thousand, four hundred two".