133123031 has 2 divisors, whose sum is σ = 133123032. Its totient is φ = 133123030.

The previous prime is 133123027. The next prime is 133123033. The reversal of 133123031 is 130321331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133123031 - 2² = 133123027 is a prime.

It is a super-2 number, since 2×133123031² = 35443482765253922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 133123033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133123033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66561515 + 66561516.

It is an arithmetic number, because the mean of its divisors is an integer number (66561516).

Almost surely, 2^133123031 is an apocalyptic number.

133123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

133123031 is an equidigital number, since it uses as much as digits as its factorization.

133123031 is an evil number, because the sum of its binary digits is even.

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

The square root of 133123031 is about 11537.8954320101. The cubic root of 133123031 is about 510.6042191539.

Adding to 133123031 its reverse (130321331), we get a palindrome (263444362).

The spelling of 133123031 in words is "one hundred thirty-three million, one hundred twenty-three thousand, thirty-one".