133210731 has 8 divisors (see below), whose sum is σ = 180624960. Its totient is φ = 87301832.

The previous prime is 133210711. The next prime is 133210739. The reversal of 133210731 is 137012331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133210731 - 2⁹ = 133210219 is a prime.

It is a super-2 number, since 2×133210731² = 35490197707108722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133210698 and 133210707.

It is not an unprimeable number, because it can be changed into a prime (133210739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376125 + ... + 376478.

It is an arithmetic number, because the mean of its divisors is an integer number (22578120).

Almost surely, 2^133210731 is an apocalyptic number.

133210731 is a deficient number, since it is larger than the sum of its proper divisors (47414229).

133210731 is an equidigital number, since it uses as much as digits as its factorization.

133210731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752665.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 133210731 is about 11541.6953260775. The cubic root of 133210731 is about 510.7163213693.

The spelling of 133210731 in words is "one hundred thirty-three million, two hundred ten thousand, seven hundred thirty-one".