133231342 has 4 divisors (see below), whose sum is σ = 199847016. Its totient is φ = 66615670.

The previous prime is 133231327. The next prime is 133231349. The reversal of 133231342 is 243132331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243132331 = 13 ⋅18702487.

It is a super-2 number, since 2×133231342² = 35501180982241928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33307834 + ... + 33307837.

It is an arithmetic number, because the mean of its divisors is an integer number (49961754).

Almost surely, 2^133231342 is an apocalyptic number.

133231342 is a deficient number, since it is larger than the sum of its proper divisors (66615674).

133231342 is an equidigital number, since it uses as much as digits as its factorization.

133231342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66615673.

The product of its digits is 1296, while the sum is 22.

The square root of 133231342 is about 11542.5881846317. The cubic root of 133231342 is about 510.7426601665.

Adding to 133231342 its reverse (243132331), we get a palindrome (376363673).

The spelling of 133231342 in words is "one hundred thirty-three million, two hundred thirty-one thousand, three hundred forty-two".