133426931 has 16 divisors (see below), whose sum is σ = 155869920. Its totient is φ = 112865280.

The previous prime is 133426919. The next prime is 133426957. The reversal of 133426931 is 139624331.

133426931 = 209² + 210² + ... + 742².

It is not a de Polignac number, because 133426931 - 2¹⁰ = 133425907 is a prime.

It is a super-2 number, since 2×133426931² = 35605491832157522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133426981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12635 + ... + 20651.

It is an arithmetic number, because the mean of its divisors is an integer number (9741870).

Almost surely, 2^133426931 is an apocalyptic number.

133426931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133426931 is a deficient number, since it is larger than the sum of its proper divisors (22442989).

133426931 is a wasteful number, since it uses less digits than its factorization.

133426931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8134.

The product of its digits is 11664, while the sum is 32.

The square root of 133426931 is about 11551.0575706296. The cubic root of 133426931 is about 510.9924682593.

The spelling of 133426931 in words is "one hundred thirty-three million, four hundred twenty-six thousand, nine hundred thirty-one".