133321031 has 4 divisors (see below), whose sum is σ = 135198864. Its totient is φ = 131443200.

The previous prime is 133320997. The next prime is 133321039. The reversal of 133321031 is 130123331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130123331 = 13 ⋅10009487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133321031 is a prime.

It is a super-2 number, since 2×133321031² = 35548994613805922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133321039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938810 + ... + 938951.

It is an arithmetic number, because the mean of its divisors is an integer number (33799716).

Almost surely, 2^133321031 is an apocalyptic number.

133321031 is a deficient number, since it is larger than the sum of its proper divisors (1877833).

133321031 is an equidigital number, since it uses as much as digits as its factorization.

133321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877832.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133321031 is about 11546.4726648444. The cubic root of 133321031 is about 510.8572421223.

Adding to 133321031 its reverse (130123331), we get a palindrome (263444362).

The spelling of 133321031 in words is "one hundred thirty-three million, three hundred twenty-one thousand, thirty-one".