133242631 has 2 divisors, whose sum is σ = 133242632. Its totient is φ = 133242630.

The previous prime is 133242601. The next prime is 133242643. The reversal of 133242631 is 136242331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133242631 - 2⁷ = 133242503 is a prime.

It is a super-2 number, since 2×133242631² = 35507197431604322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133242596 and 133242605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133242601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66621315 + 66621316.

It is an arithmetic number, because the mean of its divisors is an integer number (66621316).

Almost surely, 2^133242631 is an apocalyptic number.

133242631 is a deficient number, since it is larger than the sum of its proper divisors (1).

133242631 is an equidigital number, since it uses as much as digits as its factorization.

133242631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 133242631 is about 11543.0771893807. The cubic root of 133242631 is about 510.7570852283.

Adding to 133242631 its reverse (136242331), we get a palindrome (269484962).

The spelling of 133242631 in words is "one hundred thirty-three million, two hundred forty-two thousand, six hundred thirty-one".