133706504281 has 9 divisors (see below), whose sum is σ = 155539115199. Its totient is φ = 114603381144.

The previous prime is 133706504273. The next prime is 133706504317. The reversal of 133706504281 is 182405607331.

The square root of 133706504281 is 365659.

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

It can be written as a sum of positive squares in only one way, i.e., 52187118025 + 81519386256 = 228445^2 + 285516^2 .

It is not a de Polignac number, because 133706504281 - 2³ = 133706504273 is a prime.

It is a super-2 number, since 2×133706504281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133706507281) 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, 2533495 + ... + 2585731.

It is an arithmetic number, because the mean of its divisors is an integer number (17282123911).

Almost surely, 2^133706504281 is an apocalyptic number.

133706504281 is the 365659-th square number.

133706504281 is the 182830-th centered octagonal number.

It is an amenable number.

133706504281 is a deficient number, since it is larger than the sum of its proper divisors (21832610918).

133706504281 is an frugal number, since it uses more digits than its factorization.

133706504281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104488 (or 52244 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 133706504281 in words is "one hundred thirty-three billion, seven hundred six million, five hundred four thousand, two hundred eighty-one".