133144864 has 24 divisors (see below), whose sum is σ = 262403820. Its totient is φ = 66502656.

The previous prime is 133144859. The next prime is 133144871. The reversal of 133144864 is 468441331.

It can be written as a sum of positive squares in 2 ways, for example, as 129504400 + 3640464 = 11380^2 + 1908^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43612 + ... + 46564.

Almost surely, 2^133144864 is an apocalyptic number.

It is an amenable number.

133144864 is a deficient number, since it is larger than the sum of its proper divisors (129258956).

133144864 is a wasteful number, since it uses less digits than its factorization.

133144864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372 (or 4364 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 133144864 is about 11538.8415363068. The cubic root of 133144864 is about 510.6321317108.

The spelling of 133144864 in words is "one hundred thirty-three million, one hundred forty-four thousand, eight hundred sixty-four".