133213278 has 16 divisors (see below), whose sum is σ = 290647296. Its totient is φ = 40367640.

The previous prime is 133213277. The next prime is 133213337. The reversal of 133213278 is 872312331.

133213278 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133213271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1009126 + ... + 1009257.

It is an arithmetic number, because the mean of its divisors is an integer number (18165456).

Almost surely, 2^133213278 is an apocalyptic number.

133213278 is an abundant number, since it is smaller than the sum of its proper divisors (157434018).

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

133213278 is a wasteful number, since it uses less digits than its factorization.

133213278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018399.

The product of its digits is 6048, while the sum is 30.

The square root of 133213278 is about 11541.8056646263. The cubic root of 133213278 is about 510.7195763278.

The spelling of 133213278 in words is "one hundred thirty-three million, two hundred thirteen thousand, two hundred seventy-eight".