133232290 has 16 divisors (see below), whose sum is σ = 241146360. Its totient is φ = 52997760.

The previous prime is 133232287. The next prime is 133232303. The reversal of 133232290 is 92232331.

It can be written as a sum of positive squares in 4 ways, for example, as 23590449 + 109641841 = 4857^2 + 10471^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34995 + ... + 38614.

Almost surely, 2^133232290 is an apocalyptic number.

133232290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133232290 is a deficient number, since it is larger than the sum of its proper divisors (107914070).

133232290 is a wasteful number, since it uses less digits than its factorization.

133232290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73797.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 133232290 is about 11542.6292498720. The cubic root of 133232290 is about 510.7438715503.

The spelling of 133232290 in words is "one hundred thirty-three million, two hundred thirty-two thousand, two hundred ninety".