133431292 has 12 divisors (see below), whose sum is σ = 236129040. Its totient is φ = 65965856.

The previous prime is 133431289. The next prime is 133431293. The reversal of 133431292 is 292134331.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 133431292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133431293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187048 + ... + 187759.

It is an arithmetic number, because the mean of its divisors is an integer number (19677420).

Almost surely, 2^133431292 is an apocalyptic number.

It is an amenable number.

133431292 is a deficient number, since it is larger than the sum of its proper divisors (102697748).

133431292 is a wasteful number, since it uses less digits than its factorization.

133431292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374900 (or 374898 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 133431292 is about 11551.2463396813. The cubic root of 133431292 is about 510.9980353860.

The spelling of 133431292 in words is "one hundred thirty-three million, four hundred thirty-one thousand, two hundred ninety-two".