203783138644522 has 4 divisors (see below), whose sum is σ = 305674707966786. Its totient is φ = 101891569322260.

The previous prime is 203783138644517. The next prime is 203783138644523. The reversal of 203783138644522 is 225446831387302.

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., 196562895567921 + 7220243076601 = 14020089^2 + 2687051^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (203783138644523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50945784661129 + ... + 50945784661132.

Almost surely, 2^{203783138644522} is an apocalyptic number.

203783138644522 is a deficient number, since it is larger than the sum of its proper divisors (101891569322264).

203783138644522 is a wasteful number, since it uses less digits than its factorization.

203783138644522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101891569322263.

The product of its (nonzero) digits is 46448640, while the sum is 58.

The spelling of 203783138644522 in words is "two hundred three trillion, seven hundred eighty-three billion, one hundred thirty-eight million, six hundred forty-four thousand, five hundred twenty-two".