133247812 has 6 divisors (see below), whose sum is σ = 233183678. Its totient is φ = 66623904.

The previous prime is 133247789. The next prime is 133247831. The reversal of 133247812 is 218742331.

It can be written as a sum of positive squares in only one way, i.e., 117375556 + 15872256 = 10834^2 + 3984^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16655973 + ... + 16655980.

Almost surely, 2^133247812 is an apocalyptic number.

It is an amenable number.

133247812 is a deficient number, since it is larger than the sum of its proper divisors (99935866).

133247812 is a wasteful number, since it uses less digits than its factorization.

133247812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33311957 (or 33311955 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 133247812 is about 11543.3016074258. The cubic root of 133247812 is about 510.7637052271.

The spelling of 133247812 in words is "one hundred thirty-three million, two hundred forty-seven thousand, eight hundred twelve".