133503275161 has 9 divisors (see below), whose sum is σ = 141824956701. Its totient is φ = 125644295232.

The previous prime is 133503275159. The next prime is 133503275207. The reversal of 133503275161 is 161572305331.

The square root of 133503275161 is 365381.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4751482761 + 128751792400 = 68931^2 + 358820^2 .

It is not a de Polignac number, because 133503275161 - 2¹ = 133503275159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133503275161.

It is not an unprimeable number, because it can be changed into a prime (133503275131) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6200731 + ... + 6222223.

Almost surely, 2^133503275161 is an apocalyptic number.

133503275161 is the 365381-st square number.

133503275161 is the 182691-st centered octagonal number.

It is an amenable number.

133503275161 is a deficient number, since it is larger than the sum of its proper divisors (8321681540).

133503275161 is an frugal number, since it uses more digits than its factorization.

133503275161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43020 (or 21510 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 37.

The spelling of 133503275161 in words is "one hundred thirty-three billion, five hundred three million, two hundred seventy-five thousand, one hundred sixty-one".