133531072 has 14 divisors (see below), whose sum is σ = 264975848. Its totient is φ = 66765504.

The previous prime is 133531063. The next prime is 133531081. The reversal of 133531072 is 270135331.

It is an interprime number because it is at equal distance from previous prime (133531063) and next prime (133531081).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043148 + ... + 1043275.

Almost surely, 2^133531072 is an apocalyptic number.

It is an amenable number.

133531072 is a deficient number, since it is larger than the sum of its proper divisors (131444776).

133531072 is an equidigital number, since it uses as much as digits as its factorization.

133531072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086435 (or 2086425 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 25.

The square root of 133531072 is about 11555.5645470050. The cubic root of 133531072 is about 511.1253785277.

The spelling of 133531072 in words is "one hundred thirty-three million, five hundred thirty-one thousand, seventy-two".