133546631 has 2 divisors, whose sum is σ = 133546632. Its totient is φ = 133546630.

The previous prime is 133546583. The next prime is 133546657. The reversal of 133546631 is 136645331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133546631 - 2¹⁴ = 133530247 is a prime.

It is a super-2 number, since 2×133546631² = 35669405302900322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133546681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66773315 + 66773316.

It is an arithmetic number, because the mean of its divisors is an integer number (66773316).

Almost surely, 2^133546631 is an apocalyptic number.

133546631 is a deficient number, since it is larger than the sum of its proper divisors (1).

133546631 is an equidigital number, since it uses as much as digits as its factorization.

133546631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 32.

The square root of 133546631 is about 11556.2377528329. The cubic root of 133546631 is about 511.1452298147.

The spelling of 133546631 in words is "one hundred thirty-three million, five hundred forty-six thousand, six hundred thirty-one".