133115772 has 12 divisors (see below), whose sum is σ = 310603496. Its totient is φ = 44371920.

The previous prime is 133115761. The next prime is 133115777. The reversal of 133115772 is 277511331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133115777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5546479 + ... + 5546502.

Almost surely, 2^133115772 is an apocalyptic number.

133115772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133115772 is an abundant number, since it is smaller than the sum of its proper divisors (177487724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133115772 is a wasteful number, since it uses less digits than its factorization.

133115772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11092988 (or 11092986 counting only the distinct ones).

The product of its digits is 4410, while the sum is 30.

The square root of 133115772 is about 11537.5808556213. The cubic root of 133115772 is about 510.5949381568.

The spelling of 133115772 in words is "one hundred thirty-three million, one hundred fifteen thousand, seven hundred seventy-two".