133272981 has 12 divisors (see below), whose sum is σ = 193976640. Its totient is φ = 88169640.

The previous prime is 133272977. The next prime is 133272989. The reversal of 133272981 is 189272331.

It is not a de Polignac number, because 133272981 - 2² = 133272977 is a prime.

It is a super-2 number, since 2×133272981² = 35523374929252722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133272989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55341 + ... + 57698.

It is an arithmetic number, because the mean of its divisors is an integer number (16164720).

Almost surely, 2^133272981 is an apocalyptic number.

It is an amenable number.

133272981 is a deficient number, since it is larger than the sum of its proper divisors (60703659).

133272981 is a wasteful number, since it uses less digits than its factorization.

133272981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113176 (or 113173 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 133272981 is about 11544.3917553070. The cubic root of 133272981 is about 510.7958623589.

The spelling of 133272981 in words is "one hundred thirty-three million, two hundred seventy-two thousand, nine hundred eighty-one".